Which statement describes a chemical property of silicon?

Silicon is a brittle solid at 20 o C

Which statement describes a chemical property of aluminum?

Aluminum reacts with sulfuric acid

Aluminum conducts an electric current

Aluminum has a density of 2.698 g/cm 3 at STP

Which statement describes a chemical property of bromine?

Bromine combines with aluminum to produce AlBr 3

Bromine has a reddish-brown color

Bromine changes from a liquid to a gas at 332 K and 1 atm.

Which statement describes a chemical property of the element magnesium?

Magnesium has a high boiling point

Which phrase describes an Al atom?

a positively charged nucleus, surrounded by negatively charged electrons

a negatively charged nucleus, surrounded by negatively charged electrons

a negatively charged nucleus, surrounded by positively charged electrons

a positively charged nucleus, surrounded by positively charged electrons

Which statement describes the location of protons and neutrons in an atom of helium?

Protons and neutrons are in the nucleus

Protons and neutrons are outside the nucleus

Protons are outside the nucleus, and neutrons are in the nucleus

Protons are in the nucleus, and neutrons are outside the nucleus.

Which statement describes the location of two types of subatomic particles in a helium atom?

Protons and neutrons are located in the nucleus

Protons and neutrons are located outside of the nucleus

Protons and electrons are located in the nucleus

Protons and electrons are located outside the nucleus

Which statement describes the charge of an electron and the charge of a proton

An electron has a charge of -1, and a proton has a charge of +1

An electron and a proton both have a charge of +1

An electron and a proton both have a charge of -1

An electron has a charge of +1, and a proton has a charge of -1

At STP, both diamond and graphite are solids composed of carbon atoms. These solids have

different crystal structures and different properties

the same crystal structure and the same properties

the same crystal structure and different properties

different crystal structures and the same properties

The two forms of oxygen, O 2 (g) and O 3 (g), have

different molecular structures and different properties

different molecular structures and identical properties

identical molecular structures and identical properties

identical molecular structures and different properties

Which statement describes oxygen gas, O 2 (g), and ozone gas, O 3 (g)?

They have different molecular structures and different properties.

They have different molecular structures, only

They have different properties, only

They have the same molecular structure and the same properties.

Which statement explains why ozone gas, O 3 , and oxygen gas, O 2 , have different properties?

They have different molecular structures

They are formed from different elements

They have different oxidations numbers

They have different electronegativities

Atoms of elements in a group on the periodic table have similar chemical properties. This similarity is most closely related to the atoms'

number of principal energy levels (shells)

What occurs as two atoms of fluorine combined to become a molecule of fluorine?

A bond is formed as energy is released.

A bond is formed as energy is absorbed.

A bond is broken as energy is absorbed.

A bond is broken as energy is released

Which type of molecule is CF 4 ?

nonpolar, with a symmetrical distribution of charge

polar, with a symmetrical distribution of charge

polar, with an asymmetrical distribution of chargw

nonpolar, with an asymmetrical distribution of charge.

Chemistry Pre Assessment Regents

9th - 12th Grade

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94 Qs

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Chemistry Pre Assessment Regents

Quiz

•

Chemistry

•

9th - 12th Grade

•

Practice Problem

•

Hard

•

NGSS

HS-PS1-1, HS-PS1-2, HS-PS1-4

+11

Standards-aligned

Charles Martinez

FREE Resource

94 questions

Show all answers

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Which substance can be broken down by a chemical change?

antimony

carbon

hexane

sulfur

Which substance cannot be broken down by a chemical reaction?

ammonia

argon

methane

water

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which substance can be decomposed by a chemical change?

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which substance cannot be broken down by a chemical change?

ammonia

mercury

propane

water

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which substance can be broken down by chemical means?

magnesium

manganese

mercury

methanol

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which statement describes the type of change and the chemical properties of the product and the reactants?

The equation represents a physical change, with the product and reactants having different chemical properties

The equation represents a physical change, with the product and reactants having identical chemical properties

The equation represents a chemical change, with the product and reactants having different chemical properties

The equation represents a chemical change, with the product and reactants having identical chemical properties

Which balanced equation represents a chemical change?

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