Chemistry Concepts Flashcards

Front

Which of the following is a nonmetal?

Back

Br

Front

Elements in the same group have __ electron configurations.

Back

similar

Front

Which of the following elements has four energy levels?

Back

Rn

Front

Which of the following is a metal?

Back

mercury

Front

Isotopes are atoms of the same element with different numbers of neutrons which leads to different __ numbers.

Back

mass

Front

Which subatomic particle is the least massive?

Back

electrons

Front

How can an atom of an element be identified?

Back

number of protons in the nucleus

Front

What subatomic particle carries no charge?

Back

neutron

Front

Rutherford's gold foil experiment showed that atoms consist mainly of _______

Back

empty space.

Front

What was a major flaw of Rutherford's planetary model of the atom?

Back

it predicted electrons would gain more and more energy until they left their orbits around the nucleus