Yr 10 - Chemistry Flashcards Preview

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Flashcards in Yr 10 - Chemistry Deck (50):
1

Define chemical change

Cannot be easily reversed, chemical bonds are formed. EG rusting

2

Define physical change

Can easily be reversed, no chemical bonds formed. EG ice melts

3

Define atom

The smallest part of the element

4

Define periodic table

Table in which all know elements are arranged

5

Define malleable

Property of metal - can be shaped

6

Define density

the mass of a substance defined by its volume to determine how close the particles inside are measured in g/cm³

7

Define conductor

Property of metal can let heat and electricity through it

8

Define reactant

a substance that takes part in and undergoes change during a reaction

9

Define product

The substance that forms during a chemical reaction (appears on the right of the word or symbol equation)

10

Define valence shell

The outermost orbital of an atom

11

What are the properties of metal and explain them

(1) lustrous - shiny (2) electric/thermal conductor - alows tranfer without significant loss (3) high density - heavy for their size (4) high tensile strength - resistant to stretching (5) high melting and boiling points - NNNAAA (6) - ductile - made into wires (7) sonorous - ring noise when struct (8) malleable - shapeable

12

Example of metal, property and use

Copper is a good electrical conductor and is used in electrical circuits. Gold is malleable and can be molded into fine jewellery.

13

Explain how elements are organised in the periodic table

Groups go up and down and have the same number of electrons in their outermost shell. Periods go left to right and has the same number of electron shells. Elements in the same group or period react similar.

14

What is an isotope?

An atom with a different number of neutrons from it's element.

15

What axis is the independent var?

x

16

What axis is the dependent var?

y

17

What line sperates the metals and non-metals

B, Si, Ge, As, Sb, Te, At are the metalloids

18

What is the atomic mass?

Protons + neutrons

19

What is the atomic number?

Protons (=) electrons

20

Why are atoms neutral overall?

Because protons equal the electrons in the atom unless an ion is formed

21

Define ion

An atom or molecule with an electric charge because of the loss or gain of electrons.

22

What are the names of the groups in the periodic table?

1 = alkali metals 2 = alkali-earth metals 2.5 = transition metals 8/0 = noble gases 7 = halogens

23

Which group are stable atoms?

Noble gasses (8/0)

24

What is carbonate?

Carbon and oxygen

25

What is H

Hydrogen

26

What is He

Helium

27

What is Li

Lithium

28

What is Be

Beryllium

29

What is B

Boron

30

What is C

Carbon

31

What is N

Nitrogen

32

What is O

Oxygen

33

What is F

Fluorine

34

What is Ne

Neon

35

What is Na

Sodium

36

What is Mg

Magnesium

37

What is Al

Aluminum

38

What is Si

Silicon

39

What is P

Phosphorus

40

What is S

Sulfur

41

What is Cl

Chlorine

42

What is Ar

Argon

43

What is K

Potassium

44

What is Ca

Calcium

45

What is Au

Gold

46

What is Ag

Silver

47

What is Cu

Copper

48

What is Hg

Mercury

49

What is Fe

Iron

50

Why do atoms form ions

To become stable because some atoms have non-filled valence shells and to get a full shell it needs to donate or receive electrons.