Potassium or (K)
Answered @ 09/10/2019 11:05 PM By answersmine
11. Electrons are shared equally by two atoms.
12. Diatomic nitrogen
An example of the the first bond is the diatomic hydrogen.
There are 5 electrons in the nitrogen atom's outer shell. The 2 nitrogen atoms will each share 3 electrons to form 3 covalent bonds.
Answer is: atoms have the greatest kinetic energy in liquid iron (2,000°C).
The average kinetic energy of molecules depends on the temperature.
At high temperature(2,000°C), molecules of iron have greater kinetic energy than molecules of iron at low temperature (1,600°C, 65°C and 25°C)..
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Full Question Options (Attached)
Option 2, Option 5 and Option 6
This option is not correct because formaldehyde is not a liquid in room temperature, rather it exists in the gas phase. While propanal exists in the liquid state at room temperature.
Ethanal has a boiling point of 20.2°C while ethane has a boiling point of -89°C. This option is correct.
This option is incorrect because the polar carbon-to-oxygen double bond causes aldehydes and ketones to have higher boiling points than those of ethers and alkanes of similar molar masses.
This option is wrong because as the carbon chain increases in length, solubility in water decreases. The borderline of solubility occurs at about four carbon atoms per oxygen atom. This means the low carbon numbered ketones are soluble in water.
ketones are polar molecules because of the presence of the carbon-oxygen double bond. This option is correct.
This option is correct as they can hydrogen bond with water molecules.
Take the atomic mass in grams and the number of atoms in the sulfur molecule and multiply: so 8 x 32.065 grams = 256.52 grams. That iDVD the number of grams in one mole of sulfur. In each mole of anything there are Avogadro's number (6.022x10^23) of molecules.
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Question: How many atoms of a chlorine element would be needed to react with one atom of helium?
Answer: So... for the element of CHLORINE, you already know that the atomic number tells you the number of electrons. That means there are 17 electrons in a chlorine atom. Looking at the picture, you can see there are two electrons in shell one, eight in shell two, and seven in shell three.
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A) The helium at 15 degrees Celsius has a higher average kinetic energy that the sample at 215 K.
First, we must compare the two different temperatures in the same units. To convert Celsius into kelvin we must add it 273, so
K = °C + 273 = 15°C + 273 = 288K
And 288K > 215 K then 15°C > 215K
The increase of temperature in a gas sample causes an increase in the atom’s movement, i.e. the atoms move faster when they are heated and, for this reason, the kinetic energy of the system increases.
As helium at 15°C (288K) implies that has a higher temperature than helium at 215K, then its kinetic energy will be higher too.
1. An ionic bond is an attraction between oppositely charged ions. A covalent bond is sharing of electrons between atoms.
2. A bond between two atoms
3. covalent bond
4. They have different properties because the arrangement of atoms is different.
5. Mutual attraction between the nuclei and electrons in two different atoms
Here, we need the explain number of line spectrum in hydrogen atom in light of the Bohr's concept of orbit around the nucleus.
As per the Rutherford's atomic structure the one electron which remains in hydrogen atom can generate only one line of its spectrum. However Niels Bohr observe there are many lines in the spectrum of hydrogen.
From this observation the concept of different orbit around a nucleus of an atom generated. Which nicely can explain the number of lines in the hydrogen atom spectrum.
To have many spectral lines of an one electron atom there must be number of orbitals in which the electron can jump. If there are 4 orbitals (say). The one electron can jump from n₁ to n₂, n₂ to n₃ and so on.
Thus, it reveals there are number of orbitals around the nucleus of the hydrogen atom, for which although it has only one electron can give number of lines in its spectrum.