AP Chemistry

In a Lewis dot structure, electrons are represented by _______.

• dots

• lines

• letters

• numbers

The Lewis dot structure for oxygen (O) has _______ valence electrons.

Valence electrons are located in the _______ energy level of an atom.

• first

• second-to-last

• outermost

• innermost

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

The number of valence electrons in an atom can be determined by looking at its _______.

• atomic mass

• atomic number

• electron configuration

• isotopic composition

Tags

NGSS.HS-PS1-1

An atom with 6 valence electrons belongs to which group in the periodic table?

• Group 14

• Group 16

• Group 18

• Group 12

Tags

NGSS.HS-PS1-1

An atom with 2 valence electrons belongs to which group in the periodic table?

• Group 1

• Group 2

• Group 17

• Group 18

Tags

NGSS.HS-PS1-1

An atom with 7 valence electrons belongs to which group in the periodic table?

• Group 14

• Group 16

• Group 17

• Group 18

Tags

NGSS.HS-PS1-1

The compound with the formula NaCl is named _______.

• sodium chloride

• sodium chlorite

• sodium chlorate

• sodium chlorite

The compound with the formula CO₂ is named _______.

• carbon oxide

• carbon dioxide

• carbon monoxide

• carbon trioxide

A covalent bond is formed by the _______.

• transfer of electrons

• sharing of electrons

• attraction between oppositely charged ions

• repulsion between like charges