Overreacting

Question 1

What happens when bonds are broken?

Answer 1

it requires energy from the surroundings. It is called activation energy.

Question 2

What happens when bonds are made?

Answer 2

When bonds are made it releases energy back into surroundings

Question 3

What happens in all exothermic and endothermic reactions?

Answer 3

There is energy required and energy is releases.

Question 4

What occurs during endothermic reactions?

Answer 4

Endothermic reactions absorb energy so the temperature decreases.

Question 5

What occurs during exothermic reactions?

Answer 5

Exothermic reactions release energy so the temperature increases

Question 6

What is an example of reactants and the products that are made?

Answer 6

Sodium reacts with water to form sodium hydroxide and hydrogen

Question 7

What is the chemical process of photosynthesis?

Answer 7

Photosynthesis is the chemical reaction that allows plants to produce their own food.

Question 8

What are photosynthesis ingredients?

Answer 8

Carbon Dioxide and Water

Question 9

What are the photosynthesis products?

Answer 9

Glucose And Oxygen

Question 10

What is the law of conservation of matter?

Answer 10

During any chemical reaction the number of atoms in a element stays the same

Question 11

What are the state symbols?

Answer 11

Solid
(s) is a symbol
Na (s) example

Question 12

What are the state symbols?

Answer 12

Solid
(s) is a symbol
Na (s) example

Question 13

Why does a symbol equation provide more information?

Answer 13

A symbol equation shows formulas amd how many atoms are in each element

Question 14

How do we balance equations?

Answer 14

To balance an equation, you can only add or change coefficients

Question 15

How does the law of conservation of matter work in relation to balanced and unbalanced equations?

Answer 15

the number of atoms will stay the same

Question 16

Which numbers are the coefficient and subscript?

Answer 16

coefficient is the letter in front
Subscript is the smaller number

Question 17

How do we interpret if an equation is balanced or not?

Answer 17

When their is unequal numbers of atoms it is unbalnced
If there is a equal number of atoms it is balanced

Question 18

Why is it important to balance chemical equations?

Answer 18

There must be the same number of atoms of each element

Question 19

How are periodic tables arranged?

Answer 19

The elements are arranged in increasing order by atomic number

Question 20

What can the atomic number indicate?

Answer 20

The number of protons and electrons

Question 21

What are the rules about atom shells?

Answer 21

Start from the inner shell and build outwards

Question 22

Explain photosynthesis

Answer 22

Photosynthesis is when energy is changed to chemical energy in plant cells.

Question 23

Explain an atoms valence electrons

Answer 23

It is related to the elements position in the periodic table.

Question 24

What are noble gases stable?

Answer 24

Noble gases are stable as they have full valence shells

Question 25

Which chemical bond involve electron transfer?

Answer 25

Ionic

Question 26

Explain Ionic bonding

Answer 26

a linkage formed from the attraction between oppositely charged ions

Question 27

Explain covalent bonding

Answer 27

A chemical bond that involves the sharing of electrons to form electron pairs.

Question 28

What are properties of typical acids

Answer 28

reactive with metals, corrosive

Question 29

What are properties of typical bases?

Answer 29

Bitter taste, corrosive or caustic, slippery feel

Question 30

What does the ph scale allow us to measure?

Answer 30

To measure the strength of acids and bases

Question 31

What does litmus paper do if it is dipped in a neautral substance

Answer 31

It wont change colour because its neutral

Question 32

What happens if ocean acidity changes?

Answer 32

Increased levels of carbon dioxide in the atmosphere.

Question 33

Explain Metallic bonding

Answer 33

A metallic bond is formed between free electrons and the positively charged ions