H Unit 3.1 Quiz 1 - van ness - smchs

What is the most abundant element on the earth (including the crust, oceans, and atmosphere)?

oxygen

The number of neutrons in 1 atom of 206/82 Pb is

124

The number of neutrons in one atom of 48/22 Ti

26

The mass number of an atom equals

the number of protons plus the number of neutrons per atom

The number of protons in 199/80 Hg is

80

How many electrons are present in a bromine atom with a mass number of 88?

35

The number of protons in the nucleus of an atom is called its

atomic number

The electron was discovered by

Thomson

An element’s identity is based on its

atomic number

An ion always contains an

unequal number of protons and electrons