Atomic Structure

Atoms of the same element can differ in ______.

• atomic number

• mass number

• chemical properties

• number of protons and electrons

The number of protons in the nucleus of an atom is the _____.

• radioisotope

• mass number

• atomic number

• atomic mass

Most of the volume of an atom is occupied by the ______.

• protons

• electron cloud

• nuclides

• nucleus

The mass of a neutron is ______.

• about the same as that of a proton

• about the same as that of an electron

• double that of a proton

• double that of an electron

The nucleus of an atom has all of the following characteristics EXCEPT that it

• is very dense.

• is positively charged.

• contains nearly all of the atom's volume.

• contains nearly all of the atom's mass.

What subatomic particles would you find in the nucleus of an atom?

• Protons only
• Protons and Neutrons
• Neutrons and Electrons
• Protons and Electrons 

Tags

NGSS.MS-PS1-1

This particle determines what element you have - the elements identity.

• electron
• proton
• neutron
• valence shell

Tags

NGSS.MS-PS1-1

Has a mass of 1/200th the mass of a proton.

• electron
• neutron
• nucleus
• electron cloud

Tags

NGSS.MS-PS1-1

If an atom has 12 positively charged subatomic particles, which of the following must it also have to be considered a neutral atom?

• 12 neutrons
• 12 electrons
• 12 protons
• 24 protons and neutrons

Tags

NGSS.MS-PS1-1

An atom has 10 protons, 15 neutrons and 10 electrons what is its mass number.

• 20
• 10
• 5
• 25

Tags

NGSS.MS-PS1-1