Chemistry Unit 2 Review

Front

As you move across the periodic table, atoms tend to get smaller because:

Back

the atoms have more protons.

Front

Order the following in increasing atomic radii: Ra, Be, Ca, Rb, H

Back

H, Be, Ca, Rb, Ra

Front

Isotopes of an element have a different number of:

Back

Neutrons.

Front

How do you calculate mass number?

Back

Protons + Neutrons.

Front

What is the correct molecular formula for sodium nitrate?

Back

NaNO₃.

Front

What is the atomic number of an element?

Back

The number of protons in the nucleus of an atom.

Front

What is the difference between an atom and an ion?

Back

An atom is neutral, while an ion has a charge due to the loss or gain of electrons.

Front

What is the significance of the periodic table?

Back

It organizes elements based on their atomic number and properties.

Front

Define an isotope.

Back

Atoms of the same element with different numbers of neutrons.

Front

What is the formula for calculating the number of neutrons in an atom?

Back

Neutrons = Mass number - Atomic number.