Measurements: metric system & significant figures Flashcards Preview

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Flashcards in Measurements: metric system & significant figures Deck (60):
1

Anything that occupies space, has mass, and can be converted to energy

matter

2

A physical substance that occupies space and has mass.

matter

3

The study of that matter, including its nature, properties and transformations

chemistry

4

Basic unit of an element

atom

5

smallest unit of matter and are a building block with a defined structure and properties.

atom

6

Atoms of an ____are all identical to each other and different from atoms of a different____

element

7

combinations of atoms that also have several representations

molecule

8

3 parts of an atom

electrons, protons and neutrons

9

have a negative charge

electrons

10

have a positive charge

protons

11

have no charge at all

neutrons

12

an____has no overall charge

atom

13

the number of ____ must equal the number of protons

electrons

14

Atoms of a particular kind, defined by the atomic number (i.e., the number of electrons or protons.

element

15

# of electrons or protons

atomic number

16

In the Periodic table, the atomic number is listed ___the symbol

above

17

In the Periodic table, the atomic mass is given ___ it.

below

18

___and ___ have masses that are very similar to each other, but ___ are much lighter,

Protons and neutrons
electrons

19

determined by all the particles but the value is dominated by the total number of protons and neutrons

atomic mass

20

The mass of protons, neutrons and electrons defined on a scale where the proton and neutron have a mass close to 1.

AMU

21

number of the protons and neutrons

AMU

22

defined as one-twelfth of the mass of the most common form of carbon, which has six protons and six neutrons.

AMU

23

Because an element is defined by an equal number of electrons and protons (that is, the atomic number) and a neutron has no charge, an element could contain any number of ____ without affecting the balance of charge.

neutrons

24

A form of an element that differs by the number of neutrons.

isotope

25

The difference between the atomic mass and the atomic number represents the number of __

neutrons

26

atomic mass - atomic number =

# of neutrons

27

Base unit for length

meter (m)

28

base unit for volume

Liter (L)

29

base unit for mass

gram (g)

30

1 meter= _ yards

1.09 yards

31

100 cm =_m

1 m

32

10mm = _ cm

1 cm

33

1000 mm = _ m

1 m

34

1 mile = _ km

1.609km

35

1 km = _m

1000 m

36

1 L = _ quarts

1.06 quarts

37

1000 ml = _ L

1 L

38

10dL = _ L

1 L

39

1 mL = _ cubic centimeter

What are two ways to write out solution?

1 cc
or
1cm (3 exponent)

40

volume= length x width x ___

height

41

454 g= _ lbs

1 lb.

42

1000 g= _kg

1 kg

43

1 g = _mg

1000 mg

44

For significant figures, zeros are significant if they are between two ___

non zero digits

45

For significant figures, zeros are significant on numbers greater than 1 when the ____is written

decimal

46

Which zeros are not significant figures?
0.005020

0.005020
XXX1234
4 sig figs

47

Which zeros are not significant figures?
1060000

1060000
123XXXX
3 sig figs

48

How many sig figs?
10.0

10.0
3 sig figs

49

How many sig figs?
40210

40210
1234X
4 sig figs

50

How many sig figs?
4.100 x 10 (negative 3 exponent)

4.100 x 10 (negative 3 exponent)
1234
4 sig figs

51

For significant figures, when multiplying and dividing, use the least number of ___

SIGNIFICANT FIGURES!

52

For significant figures, when adding or subtracting, use the least__

least number of DECIMAL PLACES!

53

base unit for time

seconds (s)

54

base unit for temperature

Celsius (C)

55

base unit for energy

calorie (cal)

56

base unit for amount of substance

mole (mol)

57

definite volume and shape

solid

58

atoms or molecules have strong attraction

solid

59

has a definite volume & shape of the container (fluid)

atoms or molecules have medium attraction

Liquid

60

expands to fill it's container
no definite volume or shape
atoms or molecules have weak attraction

gas