Which atom has the largest atomic radius? K Br Ca Kr

QUESTION POSTED AT 09/10/2019 - 11:05 PM

Answered by answersmine AT 09/10/2019 - 11:05 PM

The answer to the question is:

Potassium or (K)
Post your answer

Related questions

Relative atomic masses are measured in?

It would be atomic mass units, or amus, if I remember correctly. 

ANSWERED AT 17/10/2019 - 08:51 AM


QUESTION POSTED AT 17/10/2019 - 08:51 AM

True or false: Atoms of the same elements can have different masses

The answer is true hope it helped

ANSWERED AT 17/10/2019 - 08:49 AM


QUESTION POSTED AT 17/10/2019 - 08:49 AM

Glass is different from a mineral because it ________. select one: a. does not have atoms arranged in an orderly pattern b. is not naturally occurring c. is not a solid d. contains carbon and is therefore organic

The correct answer is A. Glass does not have an orderly arrangement of the atoms, like the minerals. Glass lacks a crystal lattice structure, and is an amorphous solid. The atoms of glass are rigidly fixed but are arranged in an orderly fashion. 

ANSWERED AT 17/10/2019 - 06:17 AM


QUESTION POSTED AT 17/10/2019 - 06:17 AM

Which shows the levels of organization within an ecosystem from largest to smallest?

Biosphere, biome, ecosystem, community, population and then individual. Should of used Google found the answer right away.

ANSWERED AT 17/10/2019 - 06:11 AM


QUESTION POSTED AT 17/10/2019 - 06:11 AM

From top to bottom in most groups of elements atomic radii tend to

As you go down a group on the periodic table, atomic radii tend to increase because elements with larger atomic numbers have more occupied electron levels which take up more space surrounding the nucleus.

I hope this helps.

ANSWERED AT 17/10/2019 - 05:59 AM


QUESTION POSTED AT 17/10/2019 - 05:59 AM

What is the minimum number of carbon atoms a ketone may contain

Three. A ketone is a carbonyl compound, meaning there is a carbon oxygen double bond. A ketone is different from an aldehyde as an aldehyde has this C=O at the end of the molecule, while a ketone is on the inside. Thus, there must be a non-terminal carbon for there to be a ketone, and so three carbons are required (minimum), with the C=O at carbon 2.

ANSWERED AT 17/10/2019 - 05:42 AM


QUESTION POSTED AT 17/10/2019 - 05:42 AM

Bonding atoms that experience large differences in electronegativity values will experience what type of bond? (2 points) Select one: a. ionic b. covalent c. hydrogen d. sharing of electrons

Answer: Option (a) is the correct answer.

Explanation:

A bond that is formed because of transfer of electrons from one atom to another is known as an ionic bond.

For example, sodium has 1 valence electron and chlorine has 7 valence electrons. So, transfer of one electron from sodium to chlorine will result in an ionic bond leading to the formation of compound NaCl.

Also, there is large difference in electronegativities of a metal and a non-metal. Usually, a metal and a non-metal form an ionic bond.

On the other hand, a bond formed by sharing of electrons is known as a covalent bond.

For example, Cl_{2} molecule has covalent bond.

Hence, we can conclude that bonding atoms that experience large differences in electronegativity values will experience ionic bond.

ANSWERED AT 17/10/2019 - 05:40 AM


QUESTION POSTED AT 17/10/2019 - 05:40 AM

A zinc atom loses 3 electrons to become a zinc ion

Now in total the ion has 27 electrons, 30 protons and 35 neutrons

ANSWERED AT 17/10/2019 - 05:34 AM


QUESTION POSTED AT 17/10/2019 - 05:34 AM

Nitrogen has an atomic mass of about 14 amu and an atomic number of 7. How many neutrons does nitrogen have?

So the atomic number of an element tells the number of proton in the element.
The atomic mass is the sum of the number of protons and neutrons.

From this we can draw up and equation:
           Atomic Mass =  (# of protons)  +  (# of neutrons)
     
    ⇒  # of neutrons = Atomic Mass - Atomic Number
                               = 14  -  7
                               =  7

Therefore nitrogen has SEVEN neutrons.

ANSWERED AT 17/10/2019 - 05:34 AM


QUESTION POSTED AT 17/10/2019 - 05:34 AM

While looking at calcuim (Ca) on the periodic table a student needs to find with a greater atomic mass in the same period.Where should the student look?

To the right of calcium and in the same period.

ANSWERED AT 17/10/2019 - 05:28 AM


QUESTION POSTED AT 17/10/2019 - 05:28 AM

Which balanced equation represents a redox reaction? 1. Mg + Cl2 → MgCl2 2. CaO + H2O → Ca(OH)2 3. HNO3 + NaOH → NaNO3 + H2O 4. NaCl + AgNO3 → AgCl + NaNO3

Answer:Correct answer is 1

Explanation:

In a redox reaction, oxidation number of elements change.

First of all, calculate oxidation number of each elements present in reactant and species.

Here Oxidation number of Mg is 0 and oxidation number of Cl in Clx_{2} is 0. Whereas oxidation number of Mg is +2 and Cl is -1 in MgClx_{2}.

Therefore Mg is being oxidized and Cl is being reduced

So (1) is a redox reaction.

ANSWERED AT 17/10/2019 - 05:17 AM


QUESTION POSTED AT 17/10/2019 - 05:17 AM

Can someone summarize the concept of Chemical bonding and counting atoms in an equation?

You need to have 8 electrons to fill an atom and to fill bond the pairs need to equal 8

ANSWERED AT 17/10/2019 - 04:54 AM


QUESTION POSTED AT 17/10/2019 - 04:54 AM

An atom in the ground state contains a total of 5 electrons 5 protons and 5 neutrons. Which Lewis electron-dot diagram represents this atom

I don't know if you didn't gave a picture choice or if i didn't get the picture.
But lets call this atom A. Electron dot formula doesn't require Neutron and Protons, its main concern is valance elections.

So atom A has 5 electrons which means 2,3 it has 3 valance electrons. Its dot formula will become
:A.

I hope this helped.

ANSWERED AT 17/10/2019 - 04:47 AM


QUESTION POSTED AT 17/10/2019 - 04:47 AM

Which statement about atoms of elements in the same group of the periodic table is true? They have similar chemical properties and the same number of valence electrons. They have the same number of protons and the same mass. They have the same number of energy levels and the same amount of reactivity. They have the same number of electrons and the same atomic radius size.

Answer: Option (a) is the correct answer.

Explanation:

Chemical properties are defined as the properties which tend to show change in chemical composition of a substance.

For example, toxicity, reactivity, combustion etc are all chemical properties.

Since, elements which belong to same period show similar chemical properties.

This is because elements that lie in the same group have same number of valence electrons. Hence, they tend to show same type of reactivity which makes them exhibit similar chemical properties.

Thus, we can conclude that the statement they have similar chemical properties and the same number of valence electrons, is true about atoms of elements in the same group of the periodic table.

ANSWERED AT 17/10/2019 - 04:40 AM


QUESTION POSTED AT 17/10/2019 - 04:40 AM

Which equivalence factor should you use to convert from 4.25 moles of Al to atoms of Al? (1 atom Al/4.25 mol Al) (6.02 x 1023 atoms Al/1 mol Al) (6.02 x 1023 atoms Al/4.25 mol) (4.25 mol Al/6.02 x 1023 atoms Al)

Avogadro's number is 1 mol  = 6.02 * 10^23 elements


It means that 1 mol of atoms is 6.02 * 10^23 atoms

1 mol of atoms = 6.02 * 10^23 atoms

From there, if you divide both sides by 1 mol of atoms, you get

1 = 6.02 * 10^23 atoms / 1 mol of atoms.


That means, that to pass from a number of moles of atoms to number of atoms you have to multipby by the conversion factor

          6.02*10^23  atoms Al/ 1 mol Al


That is the second option of the list.

ANSWERED AT 17/10/2019 - 04:25 AM


QUESTION POSTED AT 17/10/2019 - 04:25 AM

If an atom has 12 protons, 13 neutrons, and 10 electrons, what is its mass number?

25. Electrons are so small that they don't add, much if any, to the mass number. So you just add the protons and neutrons to get the rough estimate of the mass number. 

ANSWERED AT 17/10/2019 - 04:17 AM


QUESTION POSTED AT 17/10/2019 - 04:17 AM

A 30.5 gram sample of glucose (C6H12O6) contains __________ atoms of carbon.

Before we get into the calculation, there are several things that we need to pay attention to:
- There are 6 moles of C
- The carbon mass of a glucose is 180.15 g

So,

#30.5g Glucose(1 mol of glucose/180.15g Glucose)=.169 mol glucose
#169 mol glucose(6 Moles of C/1mol C6H12O6)    =1.014 mol of C 
#1.014 Mol C(6.022x10^23 atoms/ 1 Mol)                 = 6.11 X 10^23 Atoms of C

ANSWERED AT 17/10/2019 - 04:17 AM


QUESTION POSTED AT 17/10/2019 - 04:17 AM

Two or more atoms that share electrons equally make a?

A covalent bond that forms a compound.

ANSWERED AT 17/10/2019 - 04:12 AM


QUESTION POSTED AT 17/10/2019 - 04:12 AM

Gamma, beta and alpha radiation are all alike because: they all have the same mass they all have the same charge they all can be emitted from the nucleus of an atom they all have the same energy

Alpha, beta and gamma radiation are all types of radiation that can be emitted from the nucleus of an atom. Apart from this they are different. Alpha radiation consists of a helium nucleus, beta radiation consists of an electron (or positron) and gamma radiation consists of very high energy electromagnetic radiation. 

ANSWERED AT 17/10/2019 - 04:11 AM


QUESTION POSTED AT 17/10/2019 - 04:11 AM

Order these star structures from smallest to largest: cluster, Galaxy, local group, and supercluster

The answer is BCAD in smallest to largest

ANSWERED AT 17/10/2019 - 03:09 AM


QUESTION POSTED AT 17/10/2019 - 03:09 AM

Which statement is most consistent with the plum pudding model of the atom? 1) Electrons occupy regions of space 2) Negative particles orbit a positive nucleus 3) The atom consists of mostly empty space 4) Negative particles are embedded in atoms

Answer: 4) Negative particles are embedded in atoms


Explanation:


The plum pudding model of the atom depicts the atom as a solid sphere, positvely charged (pudding), and the negative charge, electrons (plums) uniformly distributed in the solid sphere (embedded in the pudding).


This is the electrons were distributed uniformly inside in a whole positive charge, just like plums in a pudding.


The scientist J.J. Thompson firts proposed this model to explain the neutral nature of the matter after the discovery of the electron.


Later, by 1911, the scientist Ernest Rutherforf, came out with the nuclear model of the atom as result of the gold foil experiment, which leat to think that the atom was mostly empty space (electrons surrounding a tiny nucleus).


ANSWERED AT 17/10/2019 - 03:01 AM


QUESTION POSTED AT 17/10/2019 - 03:01 AM

An atom of 40 18 Ar has a nucleus that contains a total of a) 18 electrons b) 18 protons c) 18 neutrons d) 18 nucleons

Atoms are composed of protons, electrons, and neutrons. so, answer D can be discarded because it is not what atoms are made of. 

40 and 18 represent the atomic mass and atomic number respectively. the atomic number presents the number of protons. so there are 18 protons. the number of neutrons can be determined by taking the atomic mass minus the atomic number. neutrons= 40-18= 22 neutrons.

so the answer is B

Answer A may be correct if we assume the atom is neutral. in a neutral atom, the number of protons is the same as the number of electrons. but the electrons are not in the nucleus but orbiting it. the question specified the nucleus.

ANSWERED AT 17/10/2019 - 02:48 AM


QUESTION POSTED AT 17/10/2019 - 02:48 AM

Bromine is a red-orange liquid with an average atomic mass of 79.90 amu. Its name is derived from the Greek word bromos, which means stench. It has two naturally occurring isotopes: Br-79 (78.92 amu) and Br-81 (80.92 amu). What is the abundance of the heavier isotope?

The heavier isotope is Br-81. 

to find the percentage abundance, you can use the following equation:

(exact weight of isotope #1) (abundance of isotope #1) + (exact weight of isotope #2) (abundance of isotope #2) = average atomic weight of the element

so we plug in the values, where x is our percentage abundance

(78.92) (x) + (80.92) (1 - x) = 79.90

we solve for x.

78.92X + 80.92 - 80.92X= 79.90

78.92X - 80.92X = 79.90 - 80.92

-2X= -1.02

X= -1.02 / -2= 0.51 or 51% 

51% represents the abundances of the lighters isotope. to find the heaviest, we just subtract 100 to it. 100-51= 49 %



ANSWERED AT 17/10/2019 - 02:43 AM


QUESTION POSTED AT 17/10/2019 - 02:43 AM

After lava cools below the Curie point, which is about __________, atoms in iron-bearing minerals become magnetized in the direction of Earth's magnetic field at that time and place.

The answer is:  " 550°C " .
__________________________________________________
        "After lava cools below the Curie point, which is about   550°C  , atoms in iron-bearing minerals become magnetized in the direction of Earth's magnetic field at that time and place."
_________________________________________________________ 

ANSWERED AT 17/10/2019 - 01:55 AM


QUESTION POSTED AT 17/10/2019 - 01:55 AM

Which contains a greater number of atoms, a mole of silver or a mole of gold?

A mole of gold contains a greater number of atoms

ANSWERED AT 17/10/2019 - 01:47 AM


QUESTION POSTED AT 17/10/2019 - 01:47 AM

Which element has the smallest atomic weight? Which element has the greatest atomic weight?

The lightest is hydrogen and the heaviest is hassium.

ANSWERED AT 17/10/2019 - 01:47 AM


QUESTION POSTED AT 17/10/2019 - 01:47 AM