Chemistry STAAR review 2023

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→ Read warm-up questions below:

1. What is an element?

2. Where do we find information on the elements?

Multiple Choice

What is an element?

• A substance that is made up of one type of atom and can't be reduced to simpler substances.

• A substance made of two or more different atoms chemically bonded to one another. They can only be destroyed by chemical processes.

• A material containing two or more elements or compounds that are in close contact and are mixed in any proportion. They can be separated by physical means.

Multiple Choice

Where can you find examples of Elements?

• Dictionary

• Periodic Table of Compounds

• Periodic Table of Elements

• Your Neighbor

​ELEMENTS AND THE PERIODIC TABLE ARE BROKEN UP INTO THREE TYPES

Multiple Choice

The blue elements (left side) are called 

• metals

• nonmetals

• metalloids

• noble gases

Multiple Choice

The yellow elements (right side) are called 

• metals

• nonmetals

• metalloids

• noble gases

Multiple Choice

The atoms along the staircase are called 

• metals

• nonmetals

• metalloids

• noble gases

Physical Properties of Metals

• Luster - Shines, reflects light

• Great Conductivity - How well electricity and heat travels through the element

• Malleable - Can be beaten into different shapes without breaking

• Ductile - Turned into wires

• Solid at room temperature - Except for Mercury

Multiple Choice

Luster

• how an object reflects light

• can be hammered into a shape

• transfers heat and/or electricity

Multiple Choice

Malleability

• how an object reflects light

• can be hammered into a shape

• transfers heat and/or electricity

Multiple Select

Check off all properties of metal you can observe in this image of US coins.

• Luster

• Malleable

• Conductivity

• Ductile

• Solid at room temperature

Multiple Choice

Conductivity

• how an object reflects light

• can be hammered into a shape

• transfers heat and/or electricity

Multiple Choice

Manganese is shiny, conducts heat and electricity, and can be hammered into thin sheets. What is is?

• Nonmetal

• Metal

• Metalloid

• None of the above

Properties of Nonmetals

• Essentially, they are the opposite of metals

• Dull, not shiny

• Brittle when solid

• Some are gasses

• NOT malleable, conductive, or ductile

Multiple Choice

Neon is colorless, a poor conductor of heat and is not able to be stretched. How would it be classified?

• Nonmetal

• Metalloid

• Metal

• None of the above

Multiple Select

Check off all of the nonmetal physical properties you can observe in this image of sulfur.

• Dull appearance

• Brittle solid

• Gaseous

• Not malleable

Properties of Metalloids

• Properties are between metals and nonmetals 

• Can have a metallic luster, or be dull

• Conductive, but less than metals

• Solid at room temperature, but more brittle than metals

• Usually malleable and ductile

Multiple Choice

Anytime you see the word SEMICONDUCTOR - what substance do you have?

• Metal

• Nonmetal

• Metalloid

Multiple Choice

Which element is a metalloid?

• Titanium

• Selenium

• Potassium

• Polonium

​THE PERIODIC TABLE IS ALSO ORGANIZED BY GROUPS, PERIODS, AND MORE

WATCH THE VIDEO TO REMEMBER

Multiple Choice

Each column in the periodic table is called a _________ .

• period

• group

• cluster

• unit

Multiple Choice

Periods on the periodic table are __________.

• Horizontal Rows

• Vertical Columns

Multiple Choice

Groups on the periodic table are __________.

• Horizontal Rows

• Vertical Columns

Multiple Select

Elements in the same group have : (2 correct answers)

• Similar chemical properties

• Similar names

• Same number of outer (valence) electrons)

• The same number of protons

Multiple Choice

How many periods are on the periodic table?

• 5

• 6

• 7

• 8

Multiple Choice

• Same group

• Same period

Multiple Choice

Compound formulas have ____ capital letter(s).

• 1

• 2

• 3

• more than 1

Multiple Choice

Element symbols have _____ capital letter(s).

• 1

• 2

• 3

• 4

• The electron configuration of Group 8 elements completely fill the valence shell

• The filled valence shell makes Group 8 element very stable (NON-REACTIVE). They are called "noble gases".

• All elements want to have Noble Gas Electron Configuration.

Multiple Choice

Which of these is not a noble gas?

• Helium

• Argon

• Nitrogen

• Krypton

Multiple Choice

The reason that Noble Gases do not react is because

• Their outer electron shell is filled

• Their inner electron shell is filled

• They are able to bond to fill their outer shell

• None of the above, Noble Gases are highly reactive

Multiple Select

select the (ONE) property of noble gases that apply

• non reactive

• low ionization energy

• high boiling point

• can never conduct electricity

​Elements are Made of Atoms

Draw

Draw where the three subatomic particles go

Multiple Choice

What are the 3 subatomic particles that make-up the atom?

• protons, neutrons, and isotopes

• neutrons, isotopes, and electrons

• positives, negatives, and electrons

• protons, neutrons, and electrons

Multiple Choice

What subatomic particle(s) would be found orbiting the nucleus?

• Neutrons only

• Electrons only

• Protons and Neutrons

• Protons and Electrons

Multiple Choice

What two particles are in the nucleus of an atom?

• protons and electrons

• electrons and neutrons

• protons and neutrons

Multiple Choice

the central region of an atom where its neutrons and protons are is its 

• nucleus 

• electron cloud

• core 

• center 

Multiple Choice

Which subatomic particles contribute the most to the mass of an atom?

• Protons, Neutrons, Electrons

• Protons only

• Protons and Electrons

• Protons and Neutrons

Multiple Choice

What subatomic particle is electrically neutral (no charge)?

• Proton

• Ion

• Neutron

• Electron

Multiple Choice

The positive particles of an atom are 

• electrons 

• positrons 

• neutrons 

• protons 

​The periodic table provides the number of Protons, Electrons, and Neutrons for each element

Multiple Choice

The atomic number is the number of ____ in the nucleus. It's the element's "identification"!

• electrons

• neutrons

• protons

Multiple Choice

What particle(s) make up the mass number?

• electrons

• neutrons

• protons

• protons and neutrons

Multiple Choice

What is the mass number of Phosphorous (P)?

• 15

• 30

• 31

• 16

Dropdown

P=​ ​

Select answer

E=​

Select answer

N=​ ​

Select answer

Draw

Draw the Bohr Model for Lithium

​VALENCE ELECTRONS

Multiple Choice

This is a Bohr Diagram of Aluminum. How many valence electrons does Aluminum have?

• 3

• 4

• 5

Multiple Choice

How many valence electrons does Lithium (Li) have?

• 8

• 1

• 5

• 2

Multiple Choice

How many valence electrons does Tin (Sn) have?

• 8

• 7

• 5

• 4

Multiple Choice

How many valence electrons does Bromine (Br) have?

• 5

• 6

• 7

• 8

Multiple Choice

What is a valence electron?

• an electron that is found in the outermost shell of an atom. 

• an electron found in the innermost shell of an atom.

• an electron found in the middle shell.

Multiple Choice

Which element is this?

• Nickel

• Neon

• Sodium

• Nitrogen

Multiple Choice

How many valence electrons?

• 2

• 3

• 4

• 5