Question

2.1 the nature of matter
chapter 2 study guide

1. the basic unit of matter is the atom
2. what subatomic particles have a negative charge?
3. identify the elements by its symbol:

c = carbon
h = hydrogen
na = sodium

1. when two elements combine together to form a compound, does the compound still have the same chemical properties as the original elements?
2. what is a compound?

Explanation:

Step1: Answer question 1

The basic unit of matter is the atom.

Step2: Answer question 2

Electrons are sub - atomic particles with a negative charge.

Step3: Answer question 3

Carbon is C, Hydrogen is H, Sodium is Na.

Step4: Answer question 4

When elements combine to form a compound, the compound usually does not have the same chemical properties as the original elements due to chemical reactions changing the nature of substances.

Step5: Answer question 5

A compound is a substance made up of two or more different types of elements chemically combined in a fixed ratio.

Answer:

1. Atom
2. Electron
3. C, H, Na
4. No
5. A substance made up of two or more different types of elements chemically combined in a fixed ratio.