Structure of the Atom and the Periodic Table

Subatomic particle found in the nucleus are _________.

• protons and neutrons
• electrons and neutrons
• protons and electrons
• electrons only

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

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 is true about a neutral atom?

• The number of protons equal the number of neutrons
• The number of protons equal the number of electrons
• The number of neutrons equal the number of electrons
• The number of protons, neutrons, and electrons are all different

What particle decides the identity of an atom/element?

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