elements and compounds

Question 1

What is an atom

Answer 1

An atom is the smallest particle of a chemical element that can exist.

Question 2

Name the first 20 elements

Answer 2

1. Hydrogen (H)
2. Helium (He)
3. Lithium (Li)
4. Beryllium (Be)
5. Boron (B)
6. Carbon (C)
7. Nitrogen (N)
8. Oxygen (O)
9. Florine (F)
10. Neon (Ne)
11. Sodium (Na)
12. Magnesium (Mg)
13. Aluminium (Al)
14. Silicon (Si)
15. Phosphorus (P)
16. Sulphur (S)
17. Chlorine (Cl)
18. Argon (Ag)
19. Potassium (K)
20. Calcium (Ca)

Question 3

How do you work out the name of an element

Answer 3

The symbol for example H20 H is for Hydrogen and O is for oxygen.

Question 4

How do you work out the number atoms

Answer 4

The small number is how much of the element is in there.

Question 5

what happens to the particles in a chemical reaction?

Answer 5

The particles breaks bonds between the reactant molecules.

Question 6

What is hydrogen fuel?

Answer 6

What are the advantages and why is it still a problem
Hydrogen fuel is burned as fuel. It is used in fuel cells or internal combustion engines.

Question 7

Qualities of metals

Answer 7

tend to be shiny, good conductors of heat, solid at room temp

Question 8

Qualities of non metals

Answer 8

tend to be dull, bad conductors and brittle

Question 9

what is a Compound

Answer 9

two or more different atoms

Question 10

what is a pure substance

Answer 10

A pure substance is a form of matter that stays the same. Example is gold.

Question 11

what is a mixture

Answer 11

A substance made by mixing other substances together.

Question 12

what is a molecule

Answer 12

two or more atoms that are together

Question 13

what is the peroidic table song thingy

Answer 13

H HeLe BeBCaNoff Nena MaGI SipS Clagka

Question 14

what is the positive part of an atom called

Answer 14

proton

Question 15

what is the negative part of a atom called

Answer 15

electron

Question 16

what is the netural part of an atom called

Answer 16

netural

Question 17

example of a molecule

Answer 17

oxygen molecule

Question 18

first element to be discovere

Answer 18

phorophrous

Question 19

What are the two types of elements found on the Periodic Table

Answer 19

1. Atom
2. Compound

Question 20

how are the elements arraanged

Answer 20

by the atomic number

Question 21

A chemical formula is:

Answer 21

A way to tell which elements are in the compound (H20)

Question 22

builidng blocks of the human body

Answer 22

Oxygen 65%
Carbon 18%
Hydrogen 10%
Nitrogen 3%
Calcium 2%
Phosphorus 1%
Other elements 1%

Question 23

what is percentage of water in your body

Answer 23

65 percent