Electrons

Which are the positively charged particles in an atom?

• electron

• neutron

• proton

• quark

Which are the negatively charged particles in an atom?

• electron

• neutron

• proton

• quark

Which of the three parts of an atom moves through a conductor creating an electrical current?

• proton

• electron

• neutron

Electrons flow from _____ terminal to ____ terminal in an electrical circuit.

• negative, positive

• positive, negative

Tags

NGSS.HS-PS2-4

What charges will be attracted to one another?

• positive to negative

• negative to negative

• positive to positive

Answer explanation

This attraction is what causes the movement of the electrical current.

Tags

NGSS.HS-PS2-4

The electrons in the outermost shell are called

• electrons

• valance electrons

• neutrons

• negative

Answer explanation

These can also be referred to as free electrons. These electrons will be free to move throughout the conductor causing the electrical current.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

How many valance electrons can the first electron shell hold?

• 2

• 8

• 32

• 72

How many valance electrons can the second electron shell hold?

• 2

• 8

• 32

• 72

What makes something a good conductor?

• They do not have any valance, or free, electrons

• They have 1-2 valance, or free, electrons that can move through the conductor

Answer explanation

Metals will have 1-2 valance electrons and this is why they are good conductors.

Tags

NGSS.HS-PS1-3

NGSS.HS-PS2-5

What makes something a good insulator?

• They do not have any valance, or free, electrons

• They have 1-2 valance, or free, electrons that can move through the conductor

Answer explanation

Materials like plastic have full electron shells. This means no movement of electrons, and no electrical current.

Tags

NGSS.HS-PS2-6