Intro To Chemistry

Question 1

What are elements? (3 things)

Answer 1

1. Can not be broken down into simpler substances
2. Pure substances
3. Found on periodic table

Question 2

What are compounds? (1 thing)

Answer 2

Two or more different elements chemically combined in a fixed proportion

Question 3

What are the two different types of mixtures?

Answer 3

1. Homogenous (solution)
2. Heterogenous (mechanical)

Question 4

What is a mixture? (2 things)

Answer 4

1. Two or more substances mixed together without producing a new substance
2. The components of a mixture must be able to be seperated by simple techniques

Question 5

What is a homogenous mixture? (1 thing)

Answer 5

A mixture in which the different phases are indistinguishable

Question 6

What is a heterogenous mixture? (1 thing)

Answer 6

A mixture in which the different phases are distinguishable

Question 7

What are physical properties? (1 thing)

Answer 7

They give us information about what a substance is like

Question 8

How do we determine physical properties? (2 things)

Answer 8

1. With the use of the 5 senses
2. Conducting simple tests

Question 9

What are quantitative properties? (1 thing)

Answer 9

Physical properties that have a numerical value

Question 10

What are qualitative properties? (2 things)

Answer 10

1. Physical properties that do not have a numerical value
2. Determined using 5 senses

Question 11

On the periodic table, what does the group number tell us about an element?

Answer 11

The number of valence electrons

Question 12

What are the two things the atomic number of an element indicates?

Answer 12

1. Where the element is on the periodic table
2. The number of protons the element has

Question 13

What is the atomic mass of an element?

Answer 13

The sum of the protons and the neutrons