Chemistry Concepts

What is the electron configuration of oxygen?

• 1s2 2s2 2p4

• 1s2 2s2 2p6

• 1s2 2s2 2p2

• 1s2 2s2 2p3

How many valence electrons does an atom of chlorine have?

• 10

• 6

• 7

• 8

What is the Lewis dot structure for carbon dioxide?

• O-C=O

• O=C-O

• O=C=O

• O-C-O

Is water wet?

• YES

• NO

What is the electron configuration of potassium?

• 1s2 2s2 2p6 3s2 3p6 4s2 4p6

• 1s2 2s2 2p6 3s2 3p6 4s2 4p1

• 1s2 2s2 2p6 3s2 3p6 4s2

• 1s2 2s2 2p6 3s2 3p6 4s1

What is the difference between ionic and covalent bonding?

• Ionic bonding involves the attraction between two atoms, while covalent bonding involves the repulsion between two atoms.

• Ionic bonding involves the transfer of electrons, while covalent bonding involves the sharing of electrons.

• Ionic bonding involves the formation of molecules, while covalent bonding involves the formation of ions.

• Ionic bonding involves the sharing of electrons, while covalent bonding involves the transfer of electrons.

How many valence electrons does an atom of nitrogen have?

• 10

• 8

• 5

• 2

What is the electron configuration of calcium?

• 1s2 2s2 2p6 3s2 3p6 4s2

• 1s2 2s2 2p6 3s2 3p6 4s1

• 1s2 2s2 2p6 3s2 3p6 4s3

• 1s2 2s2 2p6 3s2 3p6 4s4

What is the electron configuration of sulfur?

• 1s2 2s2 2p6 3s2 3p2

• 1s2 2s2 2p6 3s2 3p6

• 1s2 2s2 2p6 3s2 3p4

• 1s2 2s2 2p6 3s2 3p3

What is the difference between a cation and an anion?

• A cation is a positively charged ion, while an anion is a negatively charged ion.

• A cation is a larger ion than an anion.

• A cation and an anion have the same charge.

• A cation is a negatively charged ion, while an anion is a positively charged ion.