A1 LT1

Question 1

What is the atom composed of?

Answer 1

Dense nucleus surrounded by revolving electrons

Question 2

What equation connects the energy, mass, and velocity of a moving object?

Answer 2

E = mv^2

Question 3

What is a compound?

Answer 3

A substance containing atoms of more than one type.

Question 4

What force holds electrons in orbit around the nucleus?

Answer 4

Force of attraction between nucleus and electrons.

Question 5

What are insulators?

Answer 5

Difficult to free electrons, need more energy

Question 6

What is the smallest unit of an element called?

Answer 6

Atom

Question 7

What are semiconductors?

Answer 7

Not good conductors or insulators, have four valence electrons

Question 8

What are some examples of semiconductors?

Answer 8

Carbon, silicon, germanium

Question 9

What is an element?

Answer 9

Contains atoms of only one type

Question 10

Give an example of a compound.

Answer 10

Water (H2O), Sugar (C6H12O6)

Question 11

What holds the atom together?

Answer 11

Electric forces