Atomic Concepts Review

Front

What is the mass of an electron compared to a neutron?

Back

The mass of an electron is less than the mass of a neutron.

Front

What produces the characteristic bright-line spectrum of an atom?

Back

The characteristic bright-line spectrum is produced when electrons move from higher to lower energy levels.

Front

If an element has an atomic number of 35 and 40 neutrons, what can be said about it?

Back

The atom is bromine, and it has 35 electrons.

Front

What do all isotopes of sodium have in common?

Back

All isotopes of neutral sodium have 11 protons and 11 electrons.

Front

Which notations represent isotopes of each other?

Back

O-16 and O-18 are isotopes of each other.

Front

What is an isotope?

Back

Isotopes are atoms of the same element that have the same number of protons but different numbers of neutrons.

Front

What is the atomic number of an element?

Back

The atomic number is the number of protons in the nucleus of an atom.

Front

How do you determine the mass number of an atom?

Back

The mass number is the sum of protons and neutrons in the nucleus.

Front

What is the charge of an electron?

Back

An electron has a negative charge.

Front

What is the relationship between protons and electrons in a neutral atom?

Back

In a neutral atom, the number of protons equals the number of electrons.