Sem2 Chem

Question 1

the smallest part of a element that can exist

Answer 1

atom

Question 2

a substance made of only one type of atom

Answer 2

element

Question 3

a substance made up of two or more different elements chemically bonded together

Answer 3

compound

Question 4

a substance consisting of two or more substances not chemically bonded together combined together

Answer 4

mixture

Question 5

a column of the periodic table that contains elements with similar chemical properties

Answer 5

group

Question 6

a row on the periodic table

Answer 6

period

Question 7

the general direction in which a set of data changes, i.e. increasing or decreasing

Answer 7

trend

Question 8

a series of chemical symbols showing the number of atoms of each element in the compound

Answer 8

chemical formula

Question 9

a letter or series of letters used to represent an element

Answer 9

chemical symbol

Question 10

oxygen

Answer 10

O

Question 11

hydrogen

Answer 11

H

Question 12

carbon

Answer 12

C

Question 13

sodium

Answer 13

Na

Question 14

chlorine

Answer 14

Cl

Question 15

CO2 (elements/atoms)

Answer 15

2/3

Question 16

H2O (elements/atoms)

Answer 16

2/3

Question 17

NaCl (elements/atoms)

Answer 17

2/2

Question 18

CH4 (elements/atoms)

Answer 18

2/5

Question 19

H2SO4 (elements/atoms)

Answer 19

3/7

Question 20

C6H12O6 (elements/atoms)

Answer 20

3/24

Question 21

CH3COOH (elements/atoms)

Answer 21

3/8

Question 22

The different elements
are chemically joined
together (C/M?)

Answer 22

Compound

Question 23

Each substance keeps its
own properties (C/M?)

Answer 23

Mixture

Question 24

Each substance can be
separated easily using
separating techniques
like filtration, distillation,
evaporation and
chromatography (C/M?)

Answer 24

Mixture

Question 25

You cannot vary the amount of each element (C/M?)

Answer 25

Compound

Question 26

Independent Variable

Answer 26

Measuring what stays the same

Question 27

Dependent Variable

Answer 27

Measuring the change

Question 28

What was the aim in the balloon prac

Answer 28

To observe a physical change

Question 29

Observation of balloon with heating

Answer 29

Condensation Bubbles in water Growing

Question 30

Observation of balloon while in ice bath

Answer 30

Shrinking Deflating Sagging

Question 31

What was the aim in the magnesium prac

Answer 31

To chemically combine elements to form a compound

Question 32

Chemical formula of magnesium prac

Answer 32

magnesium + oxygen = magnesium oxide (MgO)

Question 33

Name of gas magnesium reacted with

Answer 33

Oxygen