Chemistry Test Review

A Lewis Dot diagram of Phosphorus (P) would show how many electrons?

• 3

• 5

• 8

• 15

Who invented the Periodic Table?

• Gregor Mendel

• Dmitri Medeleev

• Henry Moseley

• Michelle Goode

How many neutrons does Bromine (Br) have?

• 35

• 45

• 80

• 115

Which element belongs to the least reactive group of elements?

• Neon (Ne)

• Silver (Ag)

• Carbon (C)

• Potassium (K)

An element is identify by

• its number of neutrons

• its number of protons

• its atomic mass

• the type of charge

Most of the elements on the periodic table are _________?

• metals

• nonmetals

• metalloids

• gases

How many protons are in a sodium (Na) atom?

• 1

• 3

• 11

• 23

Which element is a member of the alkaline earth metals?

• Lithium (Li)

• Bromine (Br)

• Beryllium (Be)

• Aluminum (Al)

How can the element hydrogen be classified?

• metal

• nonmetals

• metalloid

• halogen

Which of the following is a sign that a chemical reaction has occurred?

• change in shape

• formation of a gas

• melting

• dissolving