Atoms, Ions and Isotopes

The number in the upper corner of an element tile (7 for nitrogen) is called _____

• the proton number
• the atomic number
• the electron number
• the mass number

Tags

NGSS.MS-PS1-1

If an atom contains exactly three protons, then it's an atom of _____

• lithium
• gold
• nitrogen
• carbon

Tags

NGSS.MS-PS1-1

If you want to know which atom an element is, then count the _____

• protons
• neutrons
• electrons
• nucleons

Tags

NGSS.MS-PS1-1

For an atom to be electrically neutral, it must contain the same number of _____

• protons and neutrons
• neutrons and electrons
• protons and electrons
• nucleons and electrons

Tags

NGSS.MS-PS1-1

Different versions of an element, with differing numbers of neutrons, are called _____

• isosceles
• isomers
• isotopes
• isicless

Tags

NGSS.MS-PS1-1

Rounding the atomic weight to the nearest whole number gives us the _____

• proton number
• mass number
• nucleon number
• average weight

number of neutrons =  _____

• atomic number - mass number
• isotope number - atomic weight
• mass number - atomic weight
• mass number - atomic number

The nucleus contains _____

• only protons
• protons and neutrons
• protons and electrons
• electrons and neutrons

Tags

NGSS.MS-PS1-1

Which subatomic particle has a relative charge of -1?

• the proton
• the neutron
• the electron
• the photon

An aluminum isotope consists of 13 protons, 13 electrons, and 14 neutrons. Its mass number is

• 13
• 14
• 27
• 40

Tags

NGSS.MS-PS1-1