Atomic Structure Test

Which of the following has a positive charge?

• proton

• neutron

• electron

• atom

The neutral atoms of all of the isotopes of the same element have

• different numbers of protons

• equal numbers of neutrons

• the same number of protons

• the same mass numbers

An element’s atomic number is equal to its number of

• protons

• neutrons

• valence electrons

• protons and neutrons

What is the mass number of an element that has 19 protons, 19 electrons, and 20 neutrons?

• 19

• 20

• 39

• 58

A certain atom has 26 protons, 26 electrons, and 30 neutrons. Its mass number is?

• 26

• 30

• 52

• 56

Oxygen’s atomic number is 8. This means that an oxygen atom has

• eight neutrons in its nucleus

• a total of eight protons and neutrons

• eight protons in its nucleus

• a total of eight neutrons and electrons

Tags

NGSS.MS-PS1-1

Which is NOT found in the nucleus of an atom?

• electron

• neutron

• proton

• quark

Tags

NGSS.HS-PS1-8

Atoms that gain or lose electrons are called

• metals

• non metals

• ions

• isotopes

Atoms of different elements are different because they have different numbers of what type of particle?

• electrons

• photons

• protons

• neutrons

The 3 basic components of an atom are

• quarks, neutrons and electrons

• protons, neutrons and ions

• protons, neutrons and electrons

• protons, neutrinos and ions