Elements and the Periodic Table

The positively charged particles in an atom’s nucleus is the

• Electron

• Neutron

• Proton

• Isotope

Tags

NGSS.MS-PS1-1

An element’s identity can be determined from its

• Atomic number

• Number of neutrons

• Number of isotopes

• Energy levels

The smallest particle an element can be divided into is the

• Electron

• Neutron

• Isotope

• Atom

The model of the atom that described the electrons scattered throughout a ball of positive charge was proposed by

• Niels Bohr

• Ernest Rutherford

• J.J. Thomson

• John Dalton

An element’s mass number tells the number of protons in its nucleus.

• True

• False

Negatively charged particles in an atom are called electrons.

• True

• False

Tags

NGSS.MS-PS1-1

The cloud model of the atom describes the location of electrons as specific or it’s around the nucleus.

• True

• False

Tags

NGSS.MS-PS1-1

Atoms with the same number of protons but different numbers of neutrons are called isomers.

• True

• False

The sum of the protons and neutrons in an atom is called the atomic number.

• True

• False

An object that helps explain ideas about the natural world is called a model.

• True

• False