Atoms and Elements Vocabulary

How many elements are on the Periodic Table

• 20

• 3

• 118

• 50

Electrons are....

• located in the electron cloud

• moving constantly around the nucleus

• much smaller than protons and neutrons

• All of these are correct

Tags

NGSS.MS-PS1-1

The smallest unit of a pure substance that still has the identity of that substance is an ______________.

• Atom

• Element

In the periodic table, elements are arranged by ____________.

• Alphabetical Order

• Atomic Number

• Atomic Mass

An element that is shiny and bends and conducts heat and electricity is a ______________.

• Liquid

• Nonmetal

• Noble Gas

• Metal

A pure substance that contains atoms of only one kind is an ____________.

• Compound

• Element

• Mixture

The dense center of an atom is the _____________.

• Middle

• Pit

• Core

• Nucleus

A subatomic particle with a negative charge is an __________.

• Proton

• Neutron

• Electron

• Nucleus

The atomic number of an element is equal to the number of _______________ in the atom.

• Protons

• Neutrons

• Electrons

• Nuclei

The atomic mass of an element is the same as the total number of ____________.

• Protons and Electrons

• Protons and Neutrons

• Neutrons and Electrons