Question

Which answer correctly describes the difference between a homogeneous mixture and a heterogeneous mixture
A.homogeneous mixture: uniform composition throughout

heterogeneous mixture: easily distinguished substances of mixture
B.
homogeneous mixture: looks like it is made up of many substances

heterogeneous mixture: looks like it is one substance

C.
heterogeneous mixture: also known as a solution

homogeneous mixture: also known as a solid

D.
heterogeneous mixture: requires chemical separation methods

homogeneous mixture: requires physical separation methods

Answer 1

grade you are in first please

Answer 2

A.homogeneous mixture: uniform composition throughout
heterogeneous mixture: easily distinguished substances of mixture

Answer 3

what grade are you? above 8th?

Answer 4

maybe.....:}

Answer 5

I need to make sure you are above 8th grade or in 8th grade because that is what gradework this is. not trying to be rude

Answer 6

yes, its true

Answer 7

you are!?!?!yay

Answer 8

yes

Answer 9

hello?

Answer 10

thank you!!! you had it right

Answer 11

:} lol

Answer 12

:) can you help some more?

Answer 13

of course

Answer 14

this is the next one Which part of the atom is directly involved in chemical changes?

A.
the electron

B.
the energy levels

C.
the nucleus

D.
the charges

Answer 15

A?

Answer 16

yes, A

Answer 17

Which particle of the atom has no charge?

A.
nucleus

B.
proton

C.
neutron

D.
electron

Answer 18

c?

Answer 19

Yes, C

Answer 20

The atomic number of an atom will always identify the amount of protons in its nucleus. If the atom is neutral, what else is identified by the atomic number?

A.
the number of electrons in the atom

B.
the most common isotope of the atom

C.
the atomic mass of the atom

D.
the number of neutrons in the atom
d?

Answer 21

A

Answer 22

Which property of an atom's structure was used to organize the periodic table?

A.
outermost electron

B.
total electrons

C.
total protons

D.
outermost protons

Answer 23

a?

Answer 24

C - he periodic table organizes the elements in horizontal rows, or periods, by order of increasing atomic number,

Answer 25

How did early chemists determine which substances were elements?

A.
by observing chemical reactions

B.
by finding the atomic mass

C.
by counting neutrons

D.
by counting protons

Answer 26

A?

Answer 27

yup

Answer 28

On the periodic table, which group contains the noble gases?
A.
the last group

B.
the fourth group

C.
the first group

D.

Answer 29

a says the second group

Answer 30

b?

Answer 31

hello?

Answer 32

Why do elements in a group on the periodic table have similar chemical properties?

A.
same number of protons

B.
similar atomic masses

C.
similar atomic numbers

D.
same number of outermost electrons

Answer 33

d?

Answer 34

D

Answer 35

Which term refers to a substance that can only be broken down chemically?

A.
metals

B.
molecules

C.
matter

D.
mixtures
b?

Answer 36

b

Answer 37

Which property of gasoline is a physical property?

A.
odor

B.
flammability

C.
combustibility

D.
decomposition

Answer 38

a

Answer 39

Which is a chemical property of tin?

A.
ability to bond

B.
melting point

C.
ability to sink

D.
solubility

Answer 40

a?

Answer 41

yea a

Answer 42

Why is it impossible for a gas to take the shape of its container?

A.
Molecules in a gas are very far apart.

B.
Molecules in a gas are shapeless.

C.
Molecules of a gas easily interact with one another.

D.
Molecules of a gas are stationary.

Answer 43

a?

Answer 44

yeah a

Answer 45

Which type of change occurs when electrons form a bond between two atoms?

A.
atomic change

B.
chemical change

C.
physical change

D.
phase change

Answer 46

b

Answer 47

Which best describes why a chemical change is different than a physical change?

A.
A chemical change results in a new substance being formed, whereas a physical change will result in a different state of matter.

B.
A chemical change is used by scientists to create new substances, and a physical change happens naturally.

C.
A chemical change is used to identify characteristics of a substance, and a physical change identifies the behavior of a substance when in a reaction.

D.
A chemical change results in a different state of matter, and a physical change results in a new substance being formed.

Answer 48

a?

Answer 49

or d?

Answer 50

A

Answer 51

A

Answer 52

Which physical properties can be used to identify an unknown substance?

Choose all answers that are correct.

A.
volume

B.
length

C.
boiling point

D.
density

Answer 53

last one

Answer 54

D

Answer 55

C

Answer 56

both of them

Answer 57

do you agree @MiaPonce0827

Answer 58

yes

Answer 59

OMYGOODNESS! YA'LL ARE LIFESAVERS!!!!!!!

Answer 60

☻

Answer 61

Thanks!

Answer 62

OH. say no more destiny i understand.

Answer 63

Which particle of the atom has a negative charge?

A.
neutron

B.
nucleus

C.
electron

D.
proton

Answer 64

Electrons are negative.
Protons are positive,
and Neutrons are neutral :3