Atomic Structure and Radioactivity

Which subatomic particle has a positive charge?

• neutron

• photon

• proton

• electron

What is the term used to describe atoms of the same element with different numbers of neutrons?

• isotopes

• isobars

• isomers

• ions

What is the atomic number of an atom?

• The atomic number of an atom is the number of electrons in the nucleus of the atom.

• The atomic number of an atom is the number of neutrons in the nucleus of the atom.

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

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

Which subatomic particle has no charge?

• electron

• neutron

• proton

• positron

What is the overall charge of an atom?

• neutral

• negative

• positive

• half-charged

Which subatomic particle is located in the cloud surrounding the nucleus?

• proton

• neutron

• photon

• electron

What is the term used to describe the central part of an atom that contains protons and neutrons?

• outer shell

• electron cloud

• valence electrons

• nucleus

Tags

NGSS.HS-PS1-8

What is the term used to describe the spontaneous emission of radiation from an unstable atomic nucleus?

• radioactive decay

• nuclear transmutation

• radioactive decay

• nuclear fusion

• nuclear fission

Tags

NGSS.HS-PS1-8

What is the number of electrons in a neutral atom?

• The number of electrons in a neutral atom is equal to the number of protons.

• The number of electrons in a neutral atom is equal to the number of neutrons.

• The number of electrons in a neutral atom is equal to the atomic number.

• All of the above.

Which subatomic particle determines the chemical properties of an atom?

• Proton

• Neutron

• Electron

• Both proton and electron

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2