In his experiment, Rutherford concluded that atoms have a nucleus because

some of the particles were deflected back towards the alpha source.

most of the particles went straight through the foil.

some of the particles were deflected near the front of the screen.

not enough information is given.

which explanation of this notation is correct?

6 tells you there are 6 protons

6 tells you there are 6 neutrons

What do these isotopes of carbon all have in common?

protons, atomic number, and mass number

Which statement is INCORRECT use of mole measurement?

two moles of CaCl 2 is equal to 6.02 x 10 23 molecules

one mole of calcium is 40.01 grams.

one mole of calcium is equals to 6.02 x 10 23 atoms

two moles of KI is equals to 166g

When compared, a mole of oxygen and a mole of sulfur, how many atoms each has?

both contains 6.02 x 10 23 atoms

sulfur has 32.06 grams of atoms

What's a valence electron?

electrons in the outermost energy level

electrons in the second energy level

When can atoms emit photons?

When an electron is going from the excited state to the ground state

When the electron is in the ground state

When the electron is in the excited state

When an electron is going from the ground state to the excited state

What is happening in the picture

An atom is emitting a photon to go to a lower state

An atom is absorbing energy to go to a higher state

Why did the alpha particle (positively charged particle) sometimes bounce back when hitting the gold foil.

hit proton in nucleus and they repelled alpha particle

hit neutron in nucleus and they repelled alpha particle

hit electrons in electron shells and they repelled alpha particle

What did Bohr add to the model of the atom?

electrons found in specific orbits around nucleus

What electron configuration matches an oxygen atom?

1s 2 2s 2 2p 6 3s2, 3p 6 4s 2 3d 10 4p 5

1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 3d 1

What is the goal of the Lewis Dot Structure?

To show the element's valence electrons & bonding capabilities.

To determine the electron position.

To find the atomic mass of an element.

To search for the number of electrons in an individual atom.

Which of the following is NOT a property of ionic compounds?

They conduct electricity when molten

They conduct electricity when in solution

Which of the following is a characteristic property of ionic compounds?

They form hard, brittle crystals with characteristic shapes

They contain no charged particles

Which of the following describes covalent bonds?

Bonds form to fill outer electron shells

Bonds form because of opposite charges

Electrons are transferred between atoms

If an atom has no charge, which of the following must be true?

Its number of protons is equal to its number of electrons.

It has more neutrons than protons or electrons.

There are only neutrons inside the atom.

The neutrons in the atom outnumber the electrons and protons.

Which of these are an ion?

6 protons, 6 neutrons, 7 electrons

3 protons, 3 neutrons, 3 electrons.

8 protons, 8 neutrons, 8 electrons

2 protons, 3 neutrons, 2 electrons

Chemistry Midterm

Authored by Allyson Holloway

Chemistry

10th - 12th Grade

NGSS covered

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75 questions

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MULTIPLE CHOICE QUESTION

45 sec • 12 pts

A mixture that is NOT evenly distributed is called ....

Compounded

Homogenous

Heterogenous

Salty

MULTIPLE CHOICE QUESTION

20 sec • 12 pts

Are made from a combination of 2 or more elements in a constant ratio...

Atome

Mixture

Compounds

Elements

Tags

NGSS.MS-PS1-1

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

What is the formula for density?

density = mass x volume

density = mass / volume

density = mass + volume

density = mass - volume

Tags

CCSS.HSG.MG.A.2

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

What units can be used to express density?

g/mL

grams

millimeters

milliliters

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

A bar of copper has a mass of 216g and a volume of 24cm³. What is the density of copper?

9g/cm3

.11g/cm3

5184g/cm3

322mL

Tags

CCSS.6.RP.A.3D

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

What kind of properties can only be observed when a substance changes into a different substance?

physical properties

chemical properties

Tags

NGSS.MS-PS1-2

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

Properties that can be observed without changing the identity of the substance.

Physical

Chemical

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Chemistry Midterm

A mixture that is NOT evenly distributed is called ....

Are made from a combination of 2 or more elements in a constant ratio...

What is the formula for density?

What units can be used to express density?

A bar of copper has a mass of 216g and a volume of 24cm³. What is the density of copper?

What kind of properties can only be observed when a substance changes into a different substance?

Properties that can be observed without changing the identity of the substance.

Example for chemical property

Example for physical property

Example for chemical property

Access all questions and much more by creating a free account

Similar Resources on Wayground

Popular Resources on Wayground

Discover more resources for Chemistry

Chemistry Midterm

A mixture that is NOT evenly distributed is called ....

Are made from a combination of 2 or more elements in a constant ratio...

What is the formula for density?

What units can be used to express density?

A bar of copper has a mass of 216g and a volume of 24cm3. What is the density of copper?

What kind of properties can only be observed when a substance changes into a different substance?

Properties that can be observed without changing the identity of the substance.

Example for chemical property

Example for physical property

Example for chemical property

Access all questions and much more by creating a free account

Similar Resources on Wayground

Popular Resources on Wayground

Discover more resources for Chemistry

A bar of copper has a mass of 216g and a volume of 24cm³. What is the density of copper?