Atoms (Bell Work)

What is the smallest particle of an element? They are also known as the building blocks of all matter.

• mass

• atom

• hydrodgen

• protons

_________ are the positively charged particles in the nucleus of an atom.

What is the name of the particle in the nucleus of the atom that has a neutral charge (neither positive or negative)?

• neutron

• proton

• nucleus

• electron

What is the center of an atom called? It contains protons and neutrons.

• electron

• electron cloud

• nucleus

• atom

___________ are located outside the nucleus and are negatively charged particles.

This describes the number of protons in the nucleus of an atom; it defines the element (determines what type of element it is).

• valence electron

• atomic number

• atomic mass

• mass number

This is the number of protons plus neutrons in the nucleus of an atom.

• atomic number

• electron cloud

• valence electrons

• atomic mass/ mass number

An atom with the same number of protons and electrons will have a _____________ overall charge.

• positive

• negative

• neutral

• late

When an atoms loses an electron, it becomes _____________ charged.

• positively

• negatively

• neutrally

• proton

If an atom gains an electron, it becomes ____________ charged.

• positively

• negatively

• neutrally

• electron

Tags

NGSS.MS-PS2-3