chemistry semeseter exam

Question 1

what is a qualitative statement?

Answer 1

it describes something using words.

Question 2

hypothesis = ?

Answer 2

a testable statement used for making predictions and carrying out further experiments.

Question 3

laws?

Answer 3

predict what will happen

Question 4

same the SI base units

Answer 4

Kilogram, meter, second, kelvin

Question 5

density

Answer 5

the amount of matter per unit volume

Question 6

the unit centimeters cubed measures?

Answer 6

volume

Question 7

a measure of the amount of matter is ?

Answer 7

mass

Question 8

an experimental value that closely aggress with excepted values is?

Answer 8

accurate

Question 9

the symbol that represents the measured unit for volume is ?

Answer 9

milliliters

Question 10

the SI base unit for temperature is ?

Answer 10

kelvin

Question 11

the relationship between the mass, volume, and density is ?

Answer 11

DV = m

Question 12

The state of matter in which a material has a definite shape and definite volume Is?

Answer 12

SOLID STATE

Question 13

A list of pure substances could include….

Answer 13

H2O

Question 14

The melting of a candle wax is classified as physical change because?

Answer 14

It does not produce any new substances

Question 15

The most useful source of chemical information about the element is?

Answer 15

Periodic Table

Question 16

The substance classified as a fluid, contains particles that….

Answer 16

Slide past each other!

Question 17

The state of matter in which a material does not change physical state under pressure is?

Answer 17

SOLID STATE

Question 18

A horizontal row of blocks in the periodic table is called?

Answer 18

Period

Question 19

Under ordinary conditions of temperature and pressure, the particles in a gas are?

Answer 19

Very far from each other

Question 20

The particles in a solid are..?

Answer 20

Packed closely together

Question 21

The state of matter in which a material has a definite volume, but no definite shape is?

Answer 21

liquid state

Question 22

The state of matter in which particles can be compressed into a liquid is?

Answer 22

Solid State

Question 23

Which of the following is an intensive physical property?

Answer 23

Color

Question 24

There are how many groups on the period table?

Answer 24

18

Question 25

Chemical properties =?

Answer 25

changes that altar the identity of the substance!

Question 26

A physical change occurs when a?

Answer 26

A glue gun melts a glue stick?

Question 27

Properties of Metals?

Answer 27

Conduct Heat and Energy, Malleable, Solids at room temperature,

Question 28

Properties of Nonmetals?

Answer 28

Cannot conduct heat and energy, gases at room temperature, some are solids

Question 29

Metalloids

Answer 29

Characteristics of metals and nonmetals, appear along stair cases solids at room temp

Question 30

Elements in a group in the periodic table are expected to have similar?

Answer 30

Properties

Question 31

One chemical property of Matter is...?

Answer 31

reactivity

Question 32

physical means can be used to separate?

Answer 32

Mixtures

Question 33

The elements that border the zigzag line are...?

Answer 33

Metalloids

Question 34

There are how many periods in the periodic table?

Answer 34

7

Question 35

law of conservation of mass?

Answer 35

mass of compound form = mass of individual emblements

Question 36

law of multiple proportions= ?

Answer 36

atoms combined small whole ratios

Question 37

the father of the modern atomic theory

Answer 37

Daltons theory

Question 38

modern atomic theory?

Answer 38

1. all matters made up of atoms 2. atoms of different elements have different properties. 3. atoms are divisible into smaller particles. 4. atoms are indivisible by chemical processes 5. atoms of different elements combined in whole number ratios to make compounds.

Question 39

the raise produced in a cathode tube are?

Answer 39

found to carry a negative charge

Question 40

a negatively charged electrode ?

Answer 40

cathode

Question 41

experiments with cathode rays led to the discover of ?

Answer 41

the electrons

Question 42

discoverer of the nucleus

Answer 42

Rutherford

Question 43

in Rutherford's experiments few of the particles?

Answer 43

bounced back

Question 44

characteristics of the nucleus?

Answer 44

1. dense 2. positive 3. contains nearly all of the atoms mass

Question 45

why is an atom neutral ?

Answer 45

the number of protons are equal to the number of electrons

Question 46

most of the volume of an atom is occupied by?

Answer 46

electrons

Question 47

isotopes are atoms of the same element that have different ?

Answer 47

masses

Question 48

all isotopes of hydrogen contain ?

Answer 48

one proton

Question 49

the total number of protons and neutrons in the nucleus is?

Answer 49

mass number

Question 50

Positive Ion?

Answer 50

Cation

Question 51

Negative Ion?

Answer 51

Anion

Question 52

What is a bionary compound?

Answer 52

Two elements put together

Question 53

Ternary Compounds?

Answer 53

Contains Polyatomic Ions

Question 54

Acids

Answer 54

Compounds containing H & a nonmetal: MAKE SURE IT STARTS WITH AN H

Question 55

Binary Ionic Compounds

Answer 55

Contain a Metal and Nonmetal

Question 56

A solid produced by a chemical reaction in solution that separates from the solution is called?

Answer 56

A precipitate

Question 57

What is the small whole number that appears to the right of an element in a chemical formula?

Answer 57

Subscript

Question 58

To balance a chemical equation it might be necessary to adjust the....?

Answer 58

Coefficient

Question 59

According to the law of conservation of mass, the total mass of the reacting substance is?

Answer 59

equal to the total mass of the products

Question 60

A chemical equation is balanced when

Answer 60

The number of atoms in the reactants is the same number of the atoms in the products

Question 61

The symbol for a substance dissolved in water is?

Answer 61

Aq

Question 62

A chemical formula written over the arrow in a chemical equation means?

Answer 62

a catalyst for the reaction

Question 63

A balanced chemical equation is a direct representation of the?

Answer 63

Law of Conservation of Mass

Question 64

A summary of observed behavior

Answer 64

Natural Law

Question 65

An explanation of behavior

Answer 65

Theory

Question 66

What do we call a homogeneous mixture

Answer 66

A Solution

Question 67

What state of matter is a diamond

Answer 67

Solid