Question

need help asap!

Answer 1

1.
Mass divided by volume is equal to

weight.

size.

density.

area.
2.
Which of the following is not true for atoms?

They are made up of elements.

They are the building blocks of matter.

They contain a nucleus.

They are made of protons, neutrons and electrons.
3.
(SC.8.P.8.7) The nucleus of the atom contains what subatomic particle(s)?

Protons Only

Neutrons Only

Electrons Only

Protons and Neutrons

Protons and Electrons
4.
Neutrons are located

in the nucleus with protons.

in the nucleus with electrons.

in orbit around the nucleus.

both in orbit and in the nucleus.
5.
The current model of the atom states that

electrons orbit the nucleus like planets orbit the sun.

protons orbit the nucleus like planets orbit the sun.

electrons and protons move randomly around a nucleus.

electrons travel as waves in the electron cloud that surrounds the nucleus.
6.
As you move from left to right across the periodic table, the atomic numbers

increase.

decrease.

stay the same.

are random.
7.
Elements with similar properties are located

in the same row on the periodic table.

on opposite ends of the periodic table.

in the same column of the periodic table.

next to each other on the periodic table.
8.
(SC.8.P.8.6) What do the numbers listed for an element on the periodic table represent?

The lower number is the number of protons and the higher number is the mass.

The lower number is the number of neutrons and the higher number is the number of protons.

The lower number is the mass and the higher number is the number of protons and electrons.

The lower number is the number of protons and the higher number is the number of neutrons.
9.
A compound takes on

the properties of the strongest element that composes it.

a mixture of the properties of the elements that composes it.

the properties of the most abundant element that composes it.

entirely new properties than the elements that composes it.
10.
(SC.8.P.8.5) When a metal bonds with a nonmetal, they form a(n)

molecule.

ionic compound.

covalent compound.

element.
11.
The compound FeS is an example of a(n)

element.

ionic compound.

covalent compound.

atom.
12.
The compound H2O is an example of a(n)

ionic compound.

covalent compound.

trionic compound.

mixture.
13.
Compounds can be separated by

pressure.

temperature.

physical means.

chemical means.
14.
It is not possible to separate _____ by physical means.

mixtures

solutions

salt water

compounds
15.
Oxygen, sodium, and boron are examples of what type of matter?

Compound

Heterogeneous Mixture

Element

Solution
16.
(SC.8.P.8.9) A substance that has a uniform composition and is able to be separated by physical means is a(n)

Solution

Heterogeneous Mixture

Element

Compound
17.
Which of the following would be used to measure the amount of matter in an object?

Gravity

Weight

Density

Mass
18.
(SC.8.P.8.2) Which of the following measurements changes based on the strength of gravity?

Mass

Size

Length

Weight
19.
Which of the following is not an example of an extensive physical property?

Mass

Length

Size

Density
20.
(SC.8.P.8.4) A physical property that does not depend on the amount of matter in the substance is

extensive.

measurable.

intensive.

observable.
21.
(SC.8.P.8.4) Something that can be observed, measured, or changed without altering the identity of a substance is called a(n) ____ property.

physical

observable

chemical

changeable
22.
A physical property is one that

cannot be observed.

can be observed by altering the identity.

can be changed without altering the identity of a substance.

must be observed through chemical means.
23.
(SC.8.P.8.8) NaOH, KOH, and Ca(OH)2 are examples of

neutral compounds.

bases.

acids.

salts.
24.
Which of the following is not an acid?

HCl

H2SO4

HNO3

NaOH
25.
Which of the following is not a property of a base?

Feels slippery to the touch.

Changes red litmus to blue.

Has a sour taste.

Produces OH- ions

Description

Answer 2

how many questions is this

Answer 3

25

Answer 4

Could you please post 1 question at a time. :)

Answer 5

ok

Answer 6

Mass divided by volume is equal to

weight.

size.

density.

area.

Answer 7

The Density Calculator uses the formula that density (p) is equal to mass (M) divided by volume (V) or p=M/V. The calculator can use any two of the values to calculate the third. Density is defined as mass per unit volume.

Answer 8

Neutrons are located

in the nucleus with protons.

in the nucleus with electrons.

in orbit around the nucleus.

both in orbit and in the nucleus.

Answer 9

You know that neutrons are found in the nucleus of an atom. Under normal conditions, protons and neutrons stick together in the nucleus. During radioactive decay, they may be knocked out of there. Neutron numbers are able to change the mass of atoms, because they weigh about as much as a proton and electron together.
Now please close this and open a new post thanks :)