Atoms Unit Test

In the current model of the atom, electrons are found in the:

• Center

• Nucleus

• Electron Cloud

Which subatomic particle identifies an element?

• Proton

• Neutron

• Electron

A cation has:

• Positive charge

• Negative charge

• No charge

An atom that has GAINED electrons:

• Will have a positive charge

• Will have a negative charge

• Will be neutral

Two atoms of the same element with different numbers of protons are called:

• Ions

• Isotopes

• There is no name for this because it is impossible!

Neutrons

• Positively charged subatomic particles

• Subatomic particles with no charge

• Negatively charged subatomic particles

What is the atomic number of

• 52

• 17

• 35

Isotopes of an element contain different amounts of:

• neutrons

• electrons

• protons

What is the atomic number of the element Oxygen (O)?

• 6

• 8

• 12

What element has atomic number 29?

• Sodium (Na)

• Magnesium (Mg)

• Copper (Cu)