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Flashcards in Chemistry Deck (43):
1

_______'s results are NUMERICAL

Quantitative

2

______'s results are made by using the senses

Qualitative

3

What value tells us the number of protons in an atom of an element?

Atomic #

4

What category are born and silicon in on the periodic table?

Metalloids

5

Which of the following represents a compound: F2, Br2, NO, Ca

NO

6

What is matter?

Anything that has mass and takes up space

7

What is a physical property?

A characteristic of a substance that can be measured and observed without changing identity of substance (qualitative/quantitative)

8

Change of state is a __________ physical property.

Qualitative

9

Viscosity is a _______ physical property

Quantitative

10

What is sublimation?

Changing from a solid to a gas

11

Ductility is a _________ physical property

Quantitative

12

Hardness is a ________ physical property

Quantitative

13

Conductivity is a ____________ physical property

Quantitative

14

What is a chemical property?

The ability of a substance to change/react and form new substances

15

What are 3 examples of a chemical property?

Reactivity with acid, combustibility, corrosion (stability, toxicity)

16

What are the 5 points of the particle theory?

Particles, Identical, Spacing, Attraction, Movement

17

Matter is divided into 2 groups; _______ and _______

Mixtures (made up of 2 or more different types of particles) and pure substances (made of only 1 type o' particle)

18

What is the difference between mixtures and compounds?

Compounds are chemically combined while mixtures are physically combines

19

________ is a type of mixture in which you can see 2 or more phases

Heterogenous mixture

20

What is a physical change?

A change in matter that doesn't produce any new products or substances

21

What is a chemical change?

A change in matter that produces new substances

22

What are the 5 clues that a chemical change happened?

A new colour appears, heat is given off, bubbles of gas are formed, precipitate forms in a liquid, change is difficult to reverse

23

What is the mass number?

Total number of neutrons and protons

24

What are examples of subatomic particles?

Electrons, protons, neutrons

25

Burying garbage is a _______ change

Physical THEN chemical

26

Running a car motor is a _____ change

Chemical

27

Dissolving sugar is a ___________ change

Physical

28

Melting wax is a ________ change

Physical

29

The number of valence electrons increases ___________

As you move across a period (is the same for elements in the same group)

30

The size of an atom increases as you move _________

Down or right to left

31

What are 2 ways that atoms can combine?

1. Gaining or losing electrons
2. Sharing electrons

32

What are ionic bonds?

Ions held together by their charges, very strong (crystal lattice)

33

What are covalent bonds?

Atoms held together because they are sharing electrons

34

What is viscosity?

The measure of a substance's resistance to flow (viscous = slow)

35

What is melting point?

Temperature where a solid turns into a liquid

36

What is solubility?

A measure of the ability of a substance to dissolve in another

37

What is ductility?

The ability of a substance to be stretched into a wire

38

What is hardness?

A substance's ability to be scratched

39

What is conductivity?

A substance's ability to conduct electricity or heat

40

What is combustibility?

A substance's ability to burn in air

41

What is corrosion?

A substance's ability to react with air to form an oxide

42

What is stability?

A substance's ability to remain unchanged

43

What is toxicity?

A substance's ability to cause harmful effects in plants/animals