Semester 2 Final Practice 2nd Hour

Select 3 elements that are most similar in chemical behavior.

• Mg, Na, Pb

• N, H, He

• Ra, Ba, Be

• Sr, Rb, Y

• Li, Na, Be

The bohr model of Fluorine represented shows an atom becoming an ion using X's to represent electrons. Which ion of Fluorine is represented in the model.

• F^1-

• F¹⁺

• F^2-

• F²⁺

The bohr model of Sodium represented in the picture shows an atom and an ion using dots to represent electrons. Which ion of Sodium is represented in the model.

• Na¹⁺

• Na^1-

• Na²⁺

• Na^2-

Nitrogen has 5 valence electrons. When it reacts with other elements, it becomes ionic. What is the most common ionic charge for Nitrogen when this happens?

• -2

• +1

• -3

• +4

Francium has 1 valence electron. When it becomes an ion through bonding what is its charge?

• +7

• -7

• -1

• +1

An atom with a neutral charge has....

• the same number of electrons and neutrons.

• the same number of protons as electrons.

• differing numbers of protons and electrons.

• differing numbers of neutrons than the tile on the periodic table.

• the same number of protons as neutrons.

Which element is most likely to form an ion with a negative 1 charge?

• Lithium

• Lead

• Chlorine

• Sulfur

Which element is most likely to form an ion with an +2 charge?

• Hydrogen

• Strontium

• Aluminum

• Silicon

• Oxygen

Based on the positions on the periodic table of the atoms involved, what is the chemical formula of Gallium Oxide?

• Ga₂O₃

• GaO

• GaO₂

• Ga₃O₂

Based on the positions on the periodic table of the atoms involved, what is the chemical formula of Sodium Bromide.

• Na₂Br₂

• NaBr₂

• NaBr

• Na₂Br₃