BASIC CHEMISTRY 1 UNIT 2

Question 1

IONS

Answer 1

An atom with a charge

Question 2

IONIC BONDS

Answer 2

A chemical bond in which one atom loses an electron to form a positive ion and the other atom gains an electron to form a negative ion.

Question 3

ATOMIC MASS

Answer 3

Weighted average of the masses of all the element’s isotopes.

Question 4

SINGLE BOND

Answer 4

Share one pair of electrons

Question 5

Covalent bonds are formed by….

Answer 5

Electrons shared

Question 6

ATOMIC NUMBER

Answer 6

The number of protons in the nucleus.

Question 7

How are compounds formed?

Answer 7

Formed by two or more different elements

Question 8

NEUTRONS

Answer 8

Neutral charge, found in nucleus

Question 9

POLAR COVALENT BONDS

Answer 9

The electrons are not shared

Question 10

Facts of ionic bonds

Answer 10

1) No definite shape
2) High melting point
3) High polarity

Question 11

ATOMS

Answer 11

The building blocks of matter, smallest particle of matter.

Question 12

ORGANIC COMPOUNDS

Answer 12

1) Contain carbon
2) Found in organisms
3) Carbs, lipids, proteins, and nucleic acids

Question 13

TRIPLE BOND

Answer 13

Share three pairs of electrons

Question 14

What is 96% of the human body?

Answer 14

Oxygen, carbon, hydrogen and nitrogen.

Question 15

COVALENT BONDS

Answer 15

Chemical bonds formed by the sharing of electrons.

Question 16

CHEMICAL BONDS

Answer 16

Are chemical substances being held together by the attraction of atoms to each other through sharing as well as exchanging, of electrons or electrostatic forces.

Question 17

How does an ion become negative?

Answer 17

Accepting electrons

Question 18

Ex. of Covalent Bonds

Answer 18

Methane, hydro chloric acid

Question 19

WEIGHT

Answer 19

Is the gravitational force acting on an object.

Question 20

MATTER

Answer 20

Anything that has mass and take up space (volume)

Question 21

MASS

Answer 21

Is the amount of matter an object has. It is measured in grams.

Question 22

CHEMICAL SYMBOL

Answer 22

Is a shorthand method of representing an element. It represent an element name with one or two letters.

Question 23

Atoms are composed of particles called…..

Answer 23

1) PROTONS
2) NEUTRONS
3) ELECTRONS

Question 24

Ionic bonds are formed by….

Answer 24

one or more electrons that are transferred from one atoms to another (not more than 3).

Question 25

ELECTRONS

Answer 25

Negatively charged, found moving around the electron cloud or in orbitals.

Question 26

COMPOUNDS

Answer 26

1) Made from 2 or more different element
2) Formed through chemical reaction
3) Smallest part is a molecule

Question 27

Facts of covalent bonds

Answer 27

1) Definite shape
2) Low melting point
3) Low polarity

Question 28

Ex. of Ionic Bonds

Answer 28

Sodium chloride, sulfuric acid

Question 29

ELEMENTS FACTS

Answer 29

1) Found on Periodic Table
2) Smallest part is an atom
3) Pure substance
4) 92 found free in the environment

Question 30

PROTONS

Answer 30

Positively charged, found in nucleus

Question 31

Similar between compounds and elements….

Answer 31

1) Made of atoms
2) Essential for life
3) Found in nature

Question 32

How does an ion become positive?

Answer 32

Giving away electrons

Question 33

Similar between ionic and covalent bonds…

Answer 33

1) Both found in a type of acid
2) Both hold atoms together to form molecules

Question 34

INORGANIC COMPOUNDS

Answer 34

1) Don’t contain carbon
2) water, salts and many acids and bases

Question 35

What is an ELEMENT?

Answer 35

Is a substance that is made entirely from one type of atom, defined by the number of protons in the nucleus.

Question 36

How does polarity result?

Answer 36

From the unequal sharing of valence electrons

Question 37

DOUBLE BOND

Answer 37

Share two pairs of electrons

Question 38

How are molecules formed?

Answer 38

Two or more atoms combine