SCA _ Electricity

The effect of electricity can be seen:

• a buzzer makes noise

• a cigarrette lighter gets red hot

• a motor turns

• all answers are correct

The atom is like a tiny solar system

• True

• False

the center is calleld the nucleus and is made up of :

• tiny particle called protons and enormous electrons

• protons and neutrons

• neutrons and electrons

• none answer is correct

The valence electrons determines the atom's ability to conduct electricity

• True

• False

Condutor is:

• a substance in which electrical electrons move easily form atom to atom

• a substance in which electrical electrons can not move easily

• the solid material

• a gas

The electron is a stable elementary particle present in all atoms , orbiting the nucle

• True

• False

The proton is a stable negatively charged elementary particle found in atomic nucleus

• True

• Flase

The neutro is an elementary particle found in most atomic nucleus, having no charge

• True

• False

The electron travels in circular orbits around the nucleus.

• True

• False

A valence electron is an electron in the outer shell associated with an atom

• True

• False