Test Review Science Ch 7 L2, Ch 8 L1

What is the periodic table organized by?

• Number of neutrons

• Atomic number

• Mass number

• Number of valence electrons

What increases as you move from left to right across a period?

• Atomic mass

• Number of neutrons

• Atomic number

• Energy levels

Elements on the left side of the periodic table are mostly:

• Nonmetals

• Metals

• Metalloids

• Noble gases

Nonmetals are located on which side of the periodic table?

• Left

• Right

• Center

• Both left and right

What type of elements are found in the stair-step region between metals and nonmetals?

• Metalloids

• Noble gases

• Transition metals

• Alkali metals

Which subatomic particle has a positive charge?

• Neutron

• Proton

• Electron

• Nucleus

What is the charge of a neutron?

• Positive

• Negative

• No charge

• Both positive and negative

Which part of the atom contains both protons and neutrons?

• Nucleus

• Electron cloud

• Energy levels

• Valence shell

Electrons are located in which part of the atom?

• Nucleus

• Energy levels around the nucleus

• Inside protons

• In chemical bonds

What is a chemical bond?

• A force that holds atoms together in a compound

• A type of element found in the nucleus

• The process of splitting atoms apart

• The motion of electrons around the nucleus