Science Q.A.

Question 1

How much of a solute will dissolve in a solvent.

Answer 1

Solubility

Question 2

Rows of elements.

Answer 2

Period

Question 3

Columns of elements that have similar characteristics.

Answer 3

Families

Question 4

A solvent and a solute that are NOT chemically bonded. It can be separated.

Answer 4

Mixture

Question 5

What is a solvent?

Answer 5

The substance that dissolves the other substance. There is always more solvent than anything else. Water is an example.

Question 6

What is a solute?

Answer 6

The substance that has been dissolved in the solvent. Salt is an example.

Question 7

What is a compound?

Answer 7

2 or more elements that are chemically bonded. An example is H20.

Question 8

What is an element?

Answer 8

Pure substance. 1 kind of atom.

Question 9

The average kinetic energy of particles.

Answer 9

Temperature

Question 10

The ability to be pulled into thin wires.

Answer 10

Ductility

Question 11

How much light can pass through an object.

Answer 11

Opacity

Question 12

How shiny a substance is

Answer 12

Luster

Question 13

The movement of heated liquids and gasses carrying thermal energy with them.

Answer 13

Convection

Question 14

Heat transfer between 2 substances that are touching.

Answer 14

Conduction

Question 15

Transfer of thermal energy with no matter to carry it.

Answer 15

Radiation.

Question 16

What does the Kinetic Molecular Theory state?

Answer 16

• All matter is made of tiny particles called atoms.
• All atoms and molecules are in constant random motion.
• Particles collide with other particles, other objects, and the walls of their containers, but do NOT lose energy!

Question 17

How much mass an object has compared to how much space it takes up.

Answer 17

Density

Question 18

Very rarely combine with other elements. Most are transparent. Gas at normal room temperature. Family on the right. Neon, helium, Argon.

Answer 18

Noble Gasses.

Question 19

Silvery, opaque, soft solids with high luster and low melting points. They like to react with halogens. Potassium, sodium, lithium.

Answer 19

Alkali metals.

Question 20

More dense and harder with higher melting points than alkali metals. Have high luster. Burns red, orange, white, and green over a flame. Magnesium, calcium, barium, radium.

Answer 20

Alkaline Earth Metals.

Question 21

High densities and are good conductors of heat and electricity. Very malleable and ductible. Middle of the table. Nickel, copper, gold, silver, zinc.

Answer 21

Transition metals.

Question 22

Nonmetallic, essential for life, does not conduct heat and electricity, brittle, no luster. Oxygen, carbon, helium, hydrogen, iodine.

Answer 22

Nonmetals.

Question 23

Ability to burn.

Answer 23

Chemical property

Question 24

Ability to be dissolved.

Answer 24

Physical property.

Question 25

If something is opaque or not.

Answer 25

Physical property.

Question 26

Density: chemical or physical property?

Answer 26

Physical

Question 27

Ability to react with acid.

Answer 27

Chemical

Question 28

Ductility: chemical or physical property?

Answer 28

Physical

Question 29

Odor: chemical or physical property?

Answer 29

Physical

Question 30

Texture.

Answer 30

Physical property.

Question 31

Ability to rust.

Answer 31

Chemical property.

Question 32

Ability to react with iodine.

Answer 32

Chemical property.

Question 33

Color: chemical or physical property?

Answer 33

physical

Question 34

What are the 3 basic parts of an atom?

Answer 34

Protons, neutrons, and electrons.

Question 35

What type of charges will be attracted to each other?

Answer 35

Positive and negative.

Question 36

What are some elements in the human body?

Answer 36

Oxygen, carbon, and hydrogen.

Question 37

Where are protons found in an atom?

Answer 37

In the nucleus.

Question 38

Where are neutrons found in an atom?

Answer 38

In the nucleus.

Question 39

Where are electrons found in an atom?

Answer 39

Around the nucleus.

Question 40

How do you find the number of protons?

Answer 40

Atomic number.

Question 41

How do you find the number of electrons?

Answer 41

Same as protons.

Question 42

How do you find the number of neutrons?

Answer 42

Atomic weight minus number of protons.

Question 43

Water freezing into ice.

Answer 43

Physical. It's still water.

Question 44

Painting a fence.

Answer 44

Physical. It's still paint and it's still a fence.

Question 45

What are signs of a chemical change?

Answer 45

Color, odor, light, sound, gas, and bubbles are produced.

Question 46

What are signs of a physical change?

Answer 46

It's reversible, the state changes, it changes shape, it has to do with solubility.

Question 47

What are the units for density?

Answer 47

g/mL and g/cm3

Question 48

Liquid to solid?

Answer 48

Freezing

Question 49

Solid to gas?

Answer 49

sublimation

Question 50

Liquid to gas?

Answer 50

evaporation

Question 51

What type of energy needs to be added or removed for the state of matter to change?

Answer 51

thermal energy

Question 52

What is the Law of Conservation of Mass?

Answer 52

Matter can't be created or destroyed, it can only change form.

Question 53

How do you know if something will float or sink in water?

Answer 53

If the density is greater than 1 g/mL, it will sink. If it is less than 1 g/mL, then it will float.

Question 54

T/F: Objects in nature stack themselves based on density, with the most dense objects at the bottom.

Answer 54

true

Question 55

How can you find relative density?

Answer 55

Comparing densities of stacked substances.

Question 56

What is the "universal solvent?"

Answer 56

Water

Question 57

How can you increase solubility?

Answer 57

Increase the temperature, and crush the solute.

Question 58

What are suspensions?

Answer 58

Solutes and solvents that will never mix, like oil and water. They are insoluble.

Question 59

What is the formula for density?

Answer 59

D= mass/volume

Question 60

What is matter?

Answer 60

Anything that has mass and takes up space.

Question 61

Does matter have to be visible?

Answer 61

No. For example, air is matter.

Question 62

What are the 3 main states of matter?

Answer 62

Solid, liquid, and gas.

Question 63

What are valence electrons?

Answer 63

The electrons on the last energy level.

Question 64

What determines reactivity of atoms?

Answer 64

The number of valance electrons.

Question 65

How many valance electrons do all atoms want?

Answer 65

8

Question 66

How many electrons can go on each energy level on a bohr model?

Answer 66

Level 1: 2 Level 2: 8 Level 3: 18

Question 67

What are atoms?

Answer 67

The basic building blocks of matter. Everything is made of atoms.

Question 68

Is atomic weight the top or bottom number?

Answer 68

bottom

Question 69

Is the atomic number the top or bottom number?

Answer 69

Top

Question 70

Who was the first scientist to create the periodic table of elements?

Answer 70

Dmitri Mendeleev.

Question 71

When balancing an equation, can you change the subscripts or coefficients?

Answer 71

Coefficients.

Question 72

What is the first thing you need to do when balancing an equation?

Answer 72

Make a chart.

Question 73

What is thermal energy?

Answer 73

The energy created by the movement of particles.

Question 74

What is heat?

Answer 74

The transfer of thermal energy from one object to another.

Question 75

How does heat always move?

Answer 75

From the objects that have more heat to objects that have less heat.

Question 76

What is albedo?

Answer 76

How reflective something is.

Question 77

Something with high albedo is...

Answer 77

snow

Question 78

Something with low albedo is...

Answer 78

black rocks

Question 79

What's viscosity?

Answer 79

A measurement of a liquid's resistance to flow.

Question 80

What has high viscosity?

Answer 80

Caramel and honey

Question 81

What has low viscosity?

Answer 81

Vanilla extract and water.