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son4ous [18]
3 years ago
8

Which elements are gases at STP?

Chemistry
1 answer:
Gwar [14]3 years ago
7 0

Answer:

hydrogen (H), nitogen (N), oxygen (O), fluorine (F), chlorine (Cl), helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), radon (Rn)

Explanation: found this online, it's best to remember them.

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The electron configuration can be also be represented by writing the symbol for the occupied subshell and adding a superscript t
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Answer: The electron configuration of carbon atom is written as 1s²,2s², 2p².

Explanation:

The electronic configuration of an atom is defined as the arrangement of electrons into the shells or orbit of an atom. The constituents of an atom are proton, neutron and electron. the nucleus of an atom, where most of its mass are concentrated, consists of neutrons and protons fused together. Electrons occupy the shells surrounding the nucleus. The shells are lettered K, L, M, N and so on. Numerically, K shell is numbered 1, L is 2 and so on. These numbers also correspond with the increase in the energy level. All the electrons in K shell for instance belong to the first energy level and they have equal energy.

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L: 2n² = 2× 2² = 8

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This electron configuration of carbon can be written as 1s² 2s² 2p² where 1s, 2s, and 2p are the occupied subshells, and the superscript "2" is the number of electrons in each of these subshells.

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5. A sample of methane has a volume of 225 mL at 0.650 atm of pressure. What will the new volume be if the
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