The Chemical Context Of Life

Question 0

Atom

Answer 0

The smallest unit of matter that still retains the properties of an element

Question 1

Element

Answer 1

A substance that cannot be broken down by other substances by chemical reactions

Question 2

Molecule

Answer 2

Two or more atoms held together by covalent bonds

Question 3

Compound

Answer 3

A substance consisting of two or more different elements combined in a fixed ratio

Question 4

3 phases of matter

Answer 4

• solid
• liquid
• gas

Question 5

Matter

Answer 5

Anything made of atoms

Question 6

What are the four elements that make up 96% of our body mass?

Answer 6

• oxygen
• nitrogen
• hydrogen
• carbon

Question 7

Parts of an atom

Answer 7

• protons- +
• neutrons- =
• electrons- -

Question 8

Atomic number of an atom

Answer 8

Number of protons in a nucleus

Question 9

How many electrons are there in an uncharged atom?

Answer 9

It is equal to the number of protons in the atom that is not charged

Question 10

What determines the behavior and interactions between atoms?

Answer 10

The number of electrons in the putter she’ll.

Question 11

How many elections are in each orbital?

Answer 11

2, 8, 8,

Question 12

When are atoms stable?

Answer 12

When they are forming chemical bonds

Question 13

What is an ionic bond?

Answer 13

-Charged atoms

-

Question 14

Covalent bond

Answer 14

Shared pair of electrons

Question 15

What is a no polar covalent bond?

Answer 15

Atoms share elections equally

Question 16

What is a polar covalent bond?

Answer 16

A bond that doesn’t share electrons equally

Question 17

What is a hydrogen bond?

Answer 17

Attraction between 2 partially charged molecules

Question 18

What occurs during chemical reactions?

Answer 18

The breaking of bonds. Rearranging atoms. Not created or destroyed, or changed into different elements

Question 19

Strengths of bonds

Answer 19

Covalent- strongest
Ionic- middle
Hydrogen- weakest