chemistry

Question 1

What atomic model did John Dalton make?

Answer 1

Billiard Ball Model

Question 2

What does “atomos” mean?

Answer 2

Uncuttable

Question 3

Who came up with a theory that the world is made up of small, indestructible particles?

Answer 3

Democritus

Question 4

When did Democritus come up with the atom theory?

Answer 4

Around 400 BC

Question 5

Who discredited Democritus’s atom theory?

Answer 5

Aristotle

Question 6

Aristotle believed that the Earth is made up of four elements. What are they?

Answer 6

Earth, Fire, Water, and Air

Question 7

This model says that the atom is hard and indestructible.

Answer 7

Billiard Ball Model

Question 8

Who made the Plum Pudding Model?

Answer 8

JJ Thompson

Question 9

What model did JJ Thompson make?

Answer 9

Plum Pudding Model

Question 10

This model says that the electrons are embedded in a positively-charged sphere.

Answer 10

Plum Pudding Model

Question 11

What model did Ernest Rutherford make?

Answer 11

Nuclear Model

Question 12

Who made the nuclear model?

Answer 12

Ernest Rutherford

Question 13

This model says that the mass and all of the positive charge of an atom is concentrated in the nucleus.

Answer 13

Nuclear Model

Question 14

Who made the planetary model?

Answer 14

Niels Bohr

Question 15

What model did Niels Bohr make?

Answer 15

Planetary Model

Question 16

This model says that the electrons travel around the nucleus in a circular orbit.

Answer 16

Planetary Model

Question 17

This model says that their energy is proportional to their distance from the nucleus.

Answer 17

Planetary Model

Question 18

Several scientists made this model.

Answer 18

Quantum Model

Question 19

This model says that the electron is a wave and can be found in orbitals.

Answer 19

Quantum Model

Question 20

This is the number of protons in the nucleus.

Answer 20

Atomic Number

Question 21

It is also equal to the number of electrons, if the atom is neutral.

Answer 21

Atomic Number

Question 22

What is the symbol for atomic number?

Answer 22

Z

Question 23

This is the result of protons + neutrons.

Answer 23

Mass Number

Question 24

What is the symbol for mass number?

Answer 24

A

Question 25

What is always constant in an atom of an element?

Answer 25

The number of protons

Question 26

What may change in an atom of an element?

Answer 26

The number of electrons and neutrons

Question 27

The number of electrons and neutrons in an atom of an element may change, but the number of protons is constant. True or false?

Answer 27

True

Question 28

The number of protons in an atom determines what element it is. True or false?

Answer 28

True

Question 29

What is the atomic theory?

Answer 29

- All matter are made up of atoms. - All atoms of an element have identical chemical and physical properties. - Atoms of different elements have different sets of chemical and physical properties.

Question 30

These are highly reactive metals.

Answer 30

Alkali Metals

Question 31

These have one excess electron which they tend to lose, thus they usually have a charge of +1.

Answer 31

Alkali Metals

Question 32

These are usually compounds with halogens.

Answer 32

Alkali Metals

Question 33

These are highly reactive non-metals.

Answer 33

Halogens

Question 34

These lack one electron on their outer shell which they try to acquire from other atoms, thus they usually have a charge of -1.

Answer 34

Halogens

Question 35

These usually forms compounds with alkali metals.

Answer 35

Halogens

Question 36

These are also called inert gases.

Answer 36

Noble Gases

Question 37

These gases are unreactive, very stable elements owing to their full outer shell of eight electrons.

Answer 37

Noble Gases

Question 38

These have both metallic and non-metallic properties.

Answer 38

Metalloids

Question 39

These are the elements to the right of the metalloids.

Answer 39

Non-Metals

Question 40

There are all the elements to the left of the metalloids.

Answer 40

Metals

Question 41

These are the atoms of the same element that differ in the number of neutrons.

Answer 41

Isotopes

Question 42

What are the nuclei of the three isotopes of hydrogen?

Answer 42

Protium, Deuterium, and Tritium

Question 43

0 neutron, 1 proton

Answer 43

Protium

Question 44

1 neutron, 1 proton

Answer 44

Deuterium

Question 45

2 neutrons, 1 proton

Answer 45

Tritium

Question 46

What rule can be used to explain the reactivities and properties of elements?

Answer 46

Octet Rule

Question 47

This states that elements gain or lose electrons so that they will have the same number as the nearest noble gas.

Answer 47

Octet Rule

Question 48

What is a charged atom?

Answer 48

Ion

Question 49

What are the kinds of ions?

Answer 49

Anion and Cation

Question 50

These ions are negatively-charged and gains in electrons. There are more electrons than protons here.

Answer 50

Anion

Question 51

These ions are positively-charged and has loss in electrons. There are more protons than electrons here.

Answer 51

Cation

Question 52

This is the energy required to remove an electron from an atom.

Answer 52

Ionization Energy

Question 53

This is the energy released when an electron is added to an atom.

Answer 53

Electron Affinity

Question 54

This is the ability to attract electrons.

Answer 54

Electronegativity

Question 55

What increases downwards within a column(family) in the periodic table?

Answer 55

Atomic Size

Question 56

This decreases from left to right in the periodic table?

Answer 56

Atomic Size

Question 57

This is the number of "excess" electrons of an atom.

Answer 57

Valence Electrons

Question 58

This is every element that has the same electronic configuration as the element before it in the periodic table, plus one extra.

Answer 58

Aufbau Principle

Question 59

What shows whether an element is in the excited or ground state?

Answer 59

Electronic Configuration

Question 60

This is where electrons tend to stay unpaired in orbitals with equal energies.

Answer 60

Hund's Rule

Question 61

What are the phases of matter?

Answer 61

Solids, Liquids, Gases, and Plasma

Question 62

What are the three types of mixtures?

Answer 62

Solution, Colloid, Suspension

Question 63

Do particles dissolve in solution?

Answer 63

Yes

Question 64

Do particles dissolve in colloid?

Answer 64

No

Question 65

Do particles dissolve in suspension?

Answer 65

NO

Question 66

Do particles settle at the bottom in solution?

Answer 66

No

Question 67

Do particles settle at the bottom in colloid?

Answer 67

No

Question 68

Do particles settle at the bottom in suspension?

Answer 68

Yes

Question 69

What is the size of the particles in solution?

Answer 69

Small

Question 70

What is the size of the particles in colloid?

Answer 70

Medium

Question 71

What is the size of the particles in suspension?

Answer 71

Large

Question 72

Give examples of a solution mixture.

Answer 72

Juice Drink, Air, Alloys

Question 73

Give examples of a colloid.

Answer 73

Fog, Guava, Jelly, Blood

Question 74

Give examples of a suspension.

Answer 74

Oil and Water, Mud, Cream, and Milk

Question 75

What are the types of solutions?

Answer 75

Unsaturated, Saturated, Supersaturated, Chemical Change

Question 76

This can dissolve more solute.

Answer 76

Unsaturated Solution

Question 77

This already contains the maximum amount of solute.

Answer 77

Saturated Solution

Question 78

This uses pressure or heat to dissolve more than the usual amount of solute.

Answer 78

Supersaturated Solution

Question 79

This is the formation of new substance.

Answer 79

Chemical Change

Question 80

What are the signs of a chemical change?

Answer 80

Color, Odor, Taste Change, Gas Production/Burning, Decomposition

Question 81

What are the measuring volumes?

Answer 81

Regular Solids and Irregular Solids, Liquids, Gases

Question 82

This measure the dimensions then compute using a formula.

Answer 82

Regular Solids