SCIENCE SUMMARY & WORKSHEET YR 8...(Atoms,element,digestion,circulatory,Respiratory)

	QUESTIONS	ANSWER

1	In order to make a bond atom need to be………..	stable
2	Atom can be stable if the outer shell has…………electron	2 or 8
3	When atom loses their electron. It becomes………….	positive ion
4	When atom receiving electron. It becomes………….	negative ion
5	The more atom receive electrons the bigger…………..	negative charges
6	Metal gener ally……………………electron because have aspace in the outer	gain
7	Non metal generally ………………electron because …..	loose
8	Positive and negative ion Attract to each other to form……………..	compound
9	when metal ion attract a number of other ions will form………	lattices
10	when nonmetal form compound by sharing electrons we call………	covalen bonding
11	Water is a sample of……………………..bonding	covalen
12	NaCl is a sample of………………………bonding	ionic
13	which gases are very stable on its own ….	noble Gas
14	What type of bonding by giving and receiving electron ?	ionic bonding
15	What is the charge of electron ?	negative charges
16	What particle that orbit around the nucleous ?	electrons
17	what particle that in side the centre of atom with neutron ?	protons
18	atomic numbers tells us the number of………	protons
19	Every thing in the world is made from……………….	atom
20	Carbon has 6 atomic number how many protons it has?	6
21	Which element has 17 protons ?	chlorine
22	If potasium has 19 atomic number and 39 mass. The element has……electrn	39 - 19 = 20
23	Potasium has……..proton. And ………..neutrons	19 protons and 19 neutrons
24	What is the mass of Nickel if proton has 28 and has 31 electrons	mass is 59
25	substanc that canno be breakdown into smaller particle is called…….	element
26	give the sample of element at least 5	gold, iron, copper, helium, chlorine
27	Naturally occuring element or pure element is known with……….	native element
28	There are……………….naturally occuring element	92
29	What is the most abundant element….	oxygen 47%
30	Scientist now has found …………………syntetic/artificial element	25
31	Of the 118 known elements ……are metal and…………..are non metal	94 metals and 23 non metal
32	Syntetic element can be made by/…………………….	colliding natually occuring atoms together
33	Name 2 solid metalic elements….	iron and magnesium
34	Syntetic element can be made by using……………..	particle accelerator with magnet and electricity
35	A sample of liquid metalic element is	mercury







36	all elements in Group 1 are called…………….	alkali metal
37	all elements in Group 2 are called…………….	Alkeline earth metalic
38	all elements in Group 7 are called…………….	Hallogens
39	all elements in Group 8 are called…………….	Noble gas
40	could not be broken down into other substance is called…….	element
41	Element that have properties metal and non metal are called….	metalloids
42	Properties that are britttle, poor cunductivity, melt at low tempt 43.	non metals