Science Test

Question 1

3 subatomic particles are…..

Answer 1

Protons
Neutrons
Electrons

Question 2

What Are 3 facts about protons

Answer 2

Positive charge
1 a.m.u.
In nucleus

Question 3

What are 3 facts about neutrons

Answer 3

Neutral or no charge
2 a.m.u.
In nucleus

Question 4

What are 3 facts about electrons

Answer 4

Negative charge
Insignificant charge
Orbiting nucleus in shells

Question 5

What’s a period

Answer 5

A horizontal row in the periodic table. All element s in the same row have the same number of shells for there electrons to orbit.

Question 6

What is a group/family

Answer 6

The vertical lines in the periodic table. All elements in the same group have the same number of valence electrons. It also tells us what kind of ion it will form

Question 7

What’s the importance of groups and periods.

Answer 7

They are important because they help organize the elements into similar families which helps us be able to predict what elements will bond and react with other elements.

Question 8

What’s an isotope

Answer 8

When a atom gains or loses neutrons.

Question 9

Cation

Answer 9

A positively charged metal that looses electrons to become stable.

Question 10

Anion

Answer 10

A negatively charged non metal that gains electrons to become stable

Question 11

Explain how fluorine is more reactive then bromine.

Answer 11

Fluorine is more reactive then bromine because it takes less energy for fluorine to gain one electron. This is because fluorine has less shells that get in the way of its positive nucleus from attracting one electron.

Question 12

Explain how cesium is more reactive then sodium.

Answer 12

Cesium is more reactive then sodium because it has more shells in the way of the nucleus from attracting the valence electron. Becuase of this cesium so one electron can easily move away and react with other atoms.

Question 13

How are chemical bonds formed

Answer 13

When an atom gains or looses electrons to fill its outer shell.

Question 14

Neutral =

Answer 14

+=-

Question 15

Stable=

Answer 15

Valence shell is full

Question 16

Explain how ionic compounds are formed

Answer 16

Ionic compounds are formed when a metal cation and a non metal anion are attracted because of their opposite charges and Bond together held by their attraction.

nacl

Question 17

How are Molecular compounds formed

Answer 17

When 2 non metals are joined by a covalent bond (sharing of their electrons)to form a bond to fill valence shells.

H2O

Question 18

Electrolyte

Answer 18

A substance that when dissolved in water forms a solution containing electricity.

Question 19

Binary

Answer 19

2 elements

Question 20

Diatomic molecules

Answer 20

Are molecules formed by elements that always travel in pairs when alone.

H O F Br I N Cl

Question 21

WHMIS

Answer 21

Workplace hazardous materials information system

Question 22

2 characteristics of a ionic compound

Answer 22

High melting point

Contain electricity

Question 23

2 characteristics of a molecular compound

Answer 23

Low melting point

No electricity

Question 24

What is the left side of a equation called

Answer 24

Reactants

Question 25

What is the right side of an equation called

Answer 25

Product

Question 26

Classical system includes.......

Answer 26

Suffixes like ic and ous that determine charge of transition metals

Question 27

Stock system includes..... Why is it better?

Answer 27

Uses Roman numerals to show charge No memorization

Question 28

Why do we still need to know the classical system

Answer 28

Because some medicine still use the suffixes on their labels and we want to know what we are taking

Question 29

3 parts of the WHMIS legislation

Answer 29

All controlled products must have labels in French and English All controlled products must come with a material safety data sheet Any person working with controlled products must complete an educational program provided by employer

Question 30

Abbreviation for a solution

Answer 30

Aq

Question 31

Symptoms of low iron levels

Answer 31

Weakness, fatigue and pale skin

Question 32

When do you use crossover method

Answer 32

With ionic compounds

Question 33

When do you'd use prefixes

Answer 33

With molecular compounds

Question 34

When do you need to check before you multiply

Answer 34

When dealing with transition metals

Question 35

What was lavoisier's law Called and what does it mean?

Answer 35

Lavoisier's law is Called the law of conservation of mass During a chemical reaction the total mass of the reacting substances is always equal to the total mass of the products. Mass before = mass after