1st Six Weeks

Total number of  ______ is equal to the atomic number of an element.

• protons
• protons and neutrons
• neutrons
• electrons

What charge does a proton have?

• positive
• negative
• no charge
• neutral

What charge does an electron have?

• positive
• negative
• neutral
• no charge

What charge does a neutron have?

• positive
• negative
• no charge
• neutral

The size of a neutron is about the same size as a(n) _______.

• electron
• proton
• atom

Where are valence electrons found?

• in the outermost energy level
• in the innermost energy level
• in the nucleus
• in the electron cloud

Horizontal rows are called _____.

• periods
• groups
• families
• atomic numbers

Vertical columns are called _____.

• groups
• periods
• atomic numbers
• atomic columns

Atoms of the same element must always have the same number of _________

• electrons
• neutrons
• isotopes
• protons

What particle decides the identity of an atom/element?

• proton
• neutron
• electron
• All of the above.