Long quiz chemistry

Question 1

OCCUPIES SPACE AND HAS MASS
•MAY EXIST AS SOLID, LIQUID OR GAS
•OCCURS IN NATURE AS PURE SUBSTANCE
AND IMPURE SUBSTANCE

Answer 1

MATTER

Question 2

•

Answer 2

MACROSCOPIC

Question 3

REFER TO PROPERTIES OF ATOMS
•THAT MEANS; THESE ARE THE PROPERTIES
OF ATOMS, IONS OR MOLECULES
•THESE CONSTITUENTS ARE INVISIBLE TO
THE NAKED EYE
•UNITS OF MEASUREMENT ARE TAKEN IN
MILLIMETRES, MICROMETRES,
NANOMETERS, PICOMETER
EXAMPLES: CHEMICAL BONDING,
ATOMICITY, INTERMOLECULAR
FORCES

Answer 3

MICROSCOPIC

Question 4

ANY CHARACTERISTIC THAT
CAN BE DETERMINED WITHOUT
CHANGING THE SUBSTANCE’S
CHEMICAL IDENTITY.
• EXAMPLES:
•COLOR AND ODOR
•HARDNESS AND TEXTURE
•LUSTER
•VOLUME, SIZE, AND SHAPE
•POLARITY
•FREEZING, BOILING AND
MELTING POINT

Answer 4

PHYSICAL PROPERTIES

Question 5

•ANY CHARACTERISTIC
THAT CAN BE DETERMINED
ONLY BY CHANGING A
SUBSTANCE’S MOLECULAR
STRUCTURE.
•HEAT COMBUSTION
•REACTIVITY WITH WATER
•PH LEVEL
•DECOMPOSITION
•FLAMMABILITY
•OXIDATION

Answer 5

CHEMICAL PROPERTIES

Question 6

PART OF PHYSICAL OF ANY CHARACTERISTIC OF MATTER THAT
DOES NOT DEPEND ON THE AMOUNT OF
THE SUBSTANCE PRESENT.

Answer 6

INTENSIVE PROPERTY

Question 7

PHYSICAL PROPERTY THAT HAS CHARACTERISTICS OF MATTER THAT
DEPENDS ON THE AMOUNT OF MATTER
BEING MEASURED.

Answer 7

EXTENSIVE PROPERTY

Question 8

THE PHYSICAL
PROPERTIES (THE WAY
IT LOOKS, SMELLS AND
FEELS) MAY OR MAY NOT
CHANGE
. THE CHANGE CAN BE
REVERSIBLE
A NEW SUBSTANCE

Answer 8

PHYSICAL CHANGE

Question 9

THE PHYSICAL
PROPERTIES
CHANGE
THE CHANGE IS NOT
REVERSIBLE
A NEW SUBSTANCE
IS PRODUCES

Answer 9

CHEMICAL CHANGE

Question 10

PLASMA TO GAS

Answer 10

RECOMBINATION

Question 11

GAS TO PLASMA

Answer 11

IONIZATION

Question 12

GAS TO LIQUID

Answer 12

CONDENSATION

Question 13

LIQUID TO GAS

Answer 13

VAPORIZATION

Question 14

GAS TO SOLID

Answer 14

DEPOSITION

Question 15

SOLID TO GAS

Answer 15

SUBLIMATION

Question 16

SOLID TO LIQUID

Answer 16

MELTING

Question 17

LIQ TO SOL

Answer 17

FREEZING

Question 18

ABSORB HEAT

Answer 18

MELTING, EVAPORATION, SUBLIMATION, IONIZATION

Question 19

RELEASE HEAT

Answer 19

FREEZING, CONDESATION, DEPOSITION, RECOMBINATION

Question 20

PURE SUBSTANCE

Answer 20

ELEMENT, COMPOUND

Question 21

IMPURE SUBSTANCE

Answer 21

HOMOGENOUS, HETEROGENOUS

Question 22

Matter having an invariant chemical
composition and distinct properties

Answer 22

Pure substance

Question 23

Fundamental substance; cannot be
separated into simpler substances by
chemical methods.

Answer 23

Element

Question 24

Substance composed of two or more
elements in fixed proportions; can be
separated into simpler substances and
elements only by chemical method.

Answer 24

Compound

Question 25

Matter consisting of two or more pure substances that retain their individual identities and can be separated by physical methods.

Answer 25

Impure substance

Question 26

Mixture having a uniform composition and properties throughout

Answer 26

Homogenous

Question 27

The mixture not having uniform composition and properties throughout

Answer 27

Heterogenous

Question 28

MEANS “DIFFERENT” •CONSISTS OF VISIBLY DIFFERENT SUBSTANCES OR PHASES (SOLID, LIQUID, GAS) •CAN BE SEPARATED BY FILTERIN

Answer 28

HETERO

Question 29

MEANS THE SAME •HAS THE SAME UNIFORM APPEARANCE AND COMPOSITION THROUGHOUT; MAINTAIN ONE PHASE (SOLID, LIQUID, GAS) •COMMONLY REFERRED TO AS SOLUTIONS

Answer 29

HOMO

Question 30

are the simplest substances. There are about 118 different elements.

Answer 30

Elements

Question 31

Each element is made up of very tiny particles called

Answer 31

Atoms

Question 32

is an element made up of only gold atoms.

Answer 32

Gold

Question 33

is an element made up of only carbon atoms

Answer 33

Carbon

Question 34

RED AND POSITIVELY CHARGED GREEN AND NEGATIVE CHARGED BLUE AND NEUTRAL CHARGED

Answer 34

PROTON ELECTRON NEUTRON

Question 35

The protons and neutrons exist in a dense core at the centre of the atom. This is called the

Answer 35

Nucleus

Question 36

The electrons are spread out around the edge of the atom. They orbit the nucleus in layers called

Answer 36

Shells

Question 37

The word atom comes from the Greek word “atomos” which means

Answer 37

Invisible

Question 38

First to proposed the idea that “All matter is made up of atoms.

Answer 38

Democritus

Question 39

4 Main Concept: ►He deduced that all elements are composed of atoms. Atoms are indivisible and indestructible particles. ►Atoms of the same element are exactly alike. ►Atoms of different elements are different. ►Compounds are formed by the joining of atoms of two or more elements.

Answer 39

John Dalton

Question 40

Discovered that atoms contained subatomic particles ► Very small, negatively charged ► Electrons ► Discovered that atoms were electrically neutral ► Contains positive charge to balance negative charge electrons

Answer 40

John Joseph Thomson

Question 41

His experiments led him to believe that protons are concentrated in a small area at the center of an atom called Nucleus ► Thin sheet of gold foil experimen

Answer 41

Ernest Rutherford

Question 42

Modified Rutherford’s model ► Proposed that each electron has a certain amount of energy ► Helped electrons move around nucleus ► Electrons move around nucleus in region called energy level

Answer 42

Niel's Bohr

Question 43

There are two properties of protons, neutrons and electrons that are especially important:

Answer 43

mass electrical charge.

Question 44

Changes in the number of particles in the nucleus (protons or neutrons) are very rare. They only take place in nuclear processes such as:

Answer 44

radioactive decay nuclear bombs nuclear reactors.

Question 45

When an atom loses or gains one or more electrons, it acquires a net electrical charge and it is called an

Answer 45

Ion

Question 46

Number of protons and neutrons in an atom

Answer 46

Mass number

Question 47

Number of protons in atom

Answer 47

Atomic number

Question 48

Abbv. used to represent atom in chemical formulas

Answer 48

Atomic symbol

Question 49

The smallest particle that can exist on its own.

Answer 49

atom

Question 50

The number of protons in the nucleus of an atom, also known as the proton number.

Answer 50

atomic number

Question 51

Negatively charged particle that orbits the nucleus of an atom.

Answer 51

electron

Question 52

A substance made up of only one type of ato

Answer 52

element

Question 53

Different atoms of the same element. They have the same number of protons and electrons, but a different number of neutrons

Answer 53

Isotope

Question 54

The dense, positively charged centre of an atom, made up of protons and neutrons.

Answer 54

Nucleus

Question 55

A neutral particle, with a mass of 1. It is found in the nucleus of an atom.

Answer 55

neutron

Question 56

the number of protons and neutrons in the nucleus of an atom.

Answer 56

mass number

Question 57

A positively particle, with a mass of 1. It is found in the nucleus of an atom

Answer 57

proton