1st 9 wks Test Flashcards Preview

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Flashcards in 1st 9 wks Test Deck (55):
1

in the periodic table, the most reactive metals are found

in group 1, the first column on the left

2

which property of bromine could you NOT predict based on the fact that it is a nonmetal in the halogen family

liquid at room temperature

3

in a neutral atom, the number of protons equals the number of

electrons

4

the elements in a row of the periodic table

have properties that change in a pattern

5

the elements in a column of the periodic table

are in the same period

6

what information in the periodic table indicates the number of protons in an atom

the elements atomic number

7

which parts of the atom move around the nucleus

electrons

8

the atomic number of an element is based on

number of protons in its nucleus

9

what is true about transition metals

they include familiar metals such as gold, silver, copper, and nickel

10

the elements that do not ordinarily form compounds are

halogens

11

which particles in atoms have a negative electric charge

electrons

12

fluorine, chlorine, bromine, and iodine are part of the family called

halogens

13

magnesium bromide is an ionic compound with the chemical formula MgBr2 what does the 2 mean

there are 2 bromide ions for every magnesium ion

14

each group in the periodic table has its own characteristic properties based on the number of

protons

15

when an atom loses an electron, it becomes a

negative ion

16

an ionic bond is the attraction between

neutral atoms

17

what is the chemical name for the compound with the formula Na2S

sodium sulfide

18

in what form can an ionic compound conduct electricity

when dissolved in water

19

a chemical bond formed when two atoms share electrons is called a(n)

covalent bond

20

the smallest particle of an element is called a(n)

atom

21

in the chemical formula for an ionic compound, which item is written first

positive ion

22

which particles in an atom are in the nucleus

protons and neutrons

23

electrons involved in bonding between atoms are

valence electrons

24

what is the greatest number of valence electrons an atom can have

8

25

if atoms of a halogen nonmetal (Group 17) gain one electron, the atoms then have

8 valence electrons

26

a chemical equation that shows the same number of each kind of atom on both sides of the equation is said to be

balanced

27

anything that has mass and takes up space

matter

28

CaCo3 represents a chemical

formula

29

a shorter, easier way to show chemical reactions, using symbols instead of words, is called a

chemical equation

30

a bottle of hydrogen peroxide that eventually turns into a bottle of water and oxygen gas is an example of a

decomposition reaction

31

a chemical reaction that absorbs energy in the form of heat is described as

unbalanced

32

the minimum amount of energy that has to be added to start a reaction is the

activation energy

33

the number placed below an element's symbol in a chemical formula is called a

subscript

34

bc atoms are so small

scientists create models to describe them

35

in an atom of fluorine, how many electrons would be found in the 2nd energy level

7

36

in an atom of carbon, how many energy levels will it have

2

37

how many electrons are located on the 3rd energy level of calcium

8

38

the combined force of attraction among water molecules and with the molecules of surrounding materials

capillary action

39

the process by which a gas changes to liquid

condensation

40

the process by which molecules at the surface of a liquid absorb enough energy to change to the gaseous state

evaporation

41

the amount of heat needed to increase the temperature of a certain amount of a substance by 1 degree Celsius

specific heat

42

a substance that dissolves another substance

solution

43

a mixture that forms when one substance dissolves another

solvent

44

form of a substance, including solid, liquid, and gas

state

45

the tightness across the surface of water caused by the polar molecules pulling on each other

surface tension

46

water is made up of _______ bonded together to form molecules

atoms

47

chemical formula for water

H2O

48

a molecule that has electrically charged area is called a(n)

polar molecules

49

how does capillary action allow water to climb up the sides if a straw

the forces of adhesion and hesion working together

50

a mixture that forms when one substance dissolves another is called a(n) __________.

solution

51

the substance that does the dissolving is called a(n) _________

solvent

52

why is water considered a polar substance

bc positive and negative hydrogen ends of on water molecule attract the negative oxygen ends of nearby water molecules

53

which state of water is a allows a fish to remain in a lake when winter temperatures are below 0°C

when the temperature reaches 0 degrees Celsius, The solid ice melts and becomes a liquid wire which allows fish to remain in water

54

what happens to the molecules of water vapor when the temperature of the gas cools to 100°C

at 100°C, liquid water boils in the molecules have enough Energy today scape the liquid and become water vapor

55

why is water often called the "universal solvent"

any substance is dissolved in water because water is polar