Week 5 Vocabulary

The total mass of an atom, usually found under the chemical symbol is called _______.

• atomic mass

• atomic number

• isotopic mass

• molecular weight

The number of protons in one atom of an element, usually found on the top left corner is called _______.

• mass number

• atomic weight

• atomic number

• isotope number

Tags

NGSS.MS-PS1-1

A small number written below the symbol of an element in a chemical formula, indicating the number of atoms of that element present in a molecule of the compound is called _______.

• subscript

• superscript

• coefficient

• prefix

Tags

NGSS.MS-PS1-1

The number in front of the formula that tells us how many molecules of a given formula are present is called _______.

• coefficient

• subscript

• exponent

• constant

A letter or pair of letters used to represent a chemical element is called _______.

• symbol

• formula

• molecule

• compound

Tags

NGSS.MS-PS1-1

The notation that tells us the number of atoms of each element in a compound is called _______.

• chemical formula

• empirical formula

• structural formula

• chemical symbol

A tiny, positively charged particle found in the nucleus of an atom is called _______.

• neutron

• electron

• proton

• neutrino

Tags

NGSS.MS-PS1-1

A tiny, negatively charged particle that orbits the nucleus of an atom is called _______.

• proton

• neutron

• positron

• electron

Tags

NGSS.MS-PS1-1

A subatomic particle found in the nucleus of an atom that has no electrical charge (neutral), and is roughly the same mass as a proton is called _______.

• neutron

• electron

• positron

• photon

Tags

NGSS.MS-PS1-1

The tiny, positively charged center of an atom, made up of protons (positively charged particles) and neutrons (neutral particles), which together contain most of the atom’s mass and determine what element it is, is called _______.

• nucleus

• electron

• molecule

• ion

Tags

NGSS.MS-PS1-1