Marshfields School
Science Department
Homework Booklet
Year 8
Elements
Compounds
Name:
__________________
Teacher: __________________
1
Elements
a Write down the symbol of an element in Group II ______________________
b Write down the symbol of the element in the same Group as Ar. _____________
c Write down the symbol of the element in the same Period as Mg. ____________
d
i In which group is element ‘a’? _____________________________________
ii Explain how you know that the letter ‘a’ is not the symbol for this element.
_______________________________________________________________
_______________________________________________________________
e How many of the elements shown are non-metals? ________________________
f Write down the symbol of an element in the same Group as element ‘c’. ________
g Which element, shown by a letter that is not its symbol, is in the same group
as N? ________________
h Which element is probably argon? _______________
I Shade in the elements that are METALS
J Write the symbols for the following elements in their correct positions:
i Sodium, symbol Na, in Group I and Period 3.
ii Chlorine, symbol Cl, in Group VII and Period 3.
iii Xenon, symbol Xe, in Group O and Period 5.
K How many elements in Group II are metals? __________________________
2
Elements & Compounds
Find the keywords in this word search:
R X Y T F M N O N E S N Y C N O I
T
E P P R O T K O D S E Y H G N I
I O B F E U M B
A S E T R E B I
L
I S O P M O C
I G P R M V Q N O P R X A R W P T
C P A U M W R C O T O E W B O Y R F S M W U G N M
T S I N U O O R Z M S Y R B O O M A G N E T
I C T
I E S G L M D R A D V U R I D L O T S F P X F M N
O B L H A Y C T D N S A B U O X A U N F F
I R J A
N U C E H B O Y S U C G C M I D L E R I C M Y Q T
M P P O M G D I R O N T N D O P I
L L G O R Z P C
E U T H R E Z O L P U X E I H C R C S U I P M P A
T R H A Y C N F Q M O Z K I
T T O C A L C I U M E
A E P N O N G T O O A T D L E L B A T N Y E X T R
L H M K L J U H K C N E H L P H E E K Y Y L L A E
Y H P F L N O I
T A U Q E U W V A M F O G P B O K
L W Z V A D E G T H D G I
ALLOY
CALCIUM
CHROMATOGRAPHY
COMPOUND
FORMULA
IRON
METAL
OXIDE
PRODUCT
REACTION
SODIUM
J A O P U H E L
ATOM
CARBON
COMBUSTION
ELEMENT
HELIUM
MAGNETIC
MIXTURE
PERIODIC
PURE
SULPHIDE
TABLE
I U M M
BOILING
CHLORIDE
COMPOSITION
EQUATION
HYDROGEN
MELTING
MOLECULE
POINT
REACTANT
SYMBOL
WORD
Which Key word is not in the Word Search? __________________________
Is it a METAL or NON METAL? ____________________________________
3
Compounds & Mixtures
Use the key words from Homework #2 to complete these questions
1. Brass and bronze are metals that are mixtures so they are called __________
2. There are ______________ atoms of oxygen in an oxygen molecule, O2.
3. There are ______________ atoms in one molecule of water, H2O.
4. There is ______________ atom of carbon in a molecule of carbon dioxide, CO2.
5. The ______________ point of pure water is 100°C.
6. There are ______________ atoms of hydrogen in the molecule C2H5OH.
7. When iron and ______________ react together, iron sulphide is formed.
8. The ______________ in a compound are chemically combined in fixed proportions.
9. During a chemical reaction there is no change in the total ______________ of the
materials
Revision