atomic structure

All atoms of the same element have the same

• # of neutons

• mass number

• atomic number

• atomic mass

What is the law of conservation of mass?

Tags

NGSS.HS-PS1-7

What is the mass number of an atom with 4 protons, 2 neutrons, and 2 electrons?

• 8

• 6

• 10

• 16

Tags

NGSS.MS-PS1-1

Which of the three sub-atomic particles is the lightest?

• the proton

• the electron

• the neutron

An atomic number is always equal to the number of

According to Dalton's Theory an atom can neither be

Tags

NGSS.HS-PS1-7

What is the atomic mass of radium

• 226

• 88

• 7

• 56

The atomic mass is the number of ______ and _______.

• protons and electrons

• protons and isotopes

• protons and neutrons

______ is the smallest unit of matter.

Tags

NGSS.MS-PS1-1

The _____ has a positive charge and is located in the center of the atom.

Tags

NGSS.HS-PS1-8