Chemical reactions

Obavezno

1

Where is most of the mass of the atom found?

Electron Cloud

Nucleus

Protons only

Neutrons only

Obavezno

1

Which statement best describes the image.

The atoms are isotopes

The atoms are ions

The atoms represent different elements

Obavezno

1

Explain why you chose your answer for #2.

Obavezno

8

Select the type of subatomic particle that matchs the statement.

1

If you see something in the classroom or laboratory that is dangerous, tell the teacher

when you have time

after class

at once

after school

1

Any spill on the floor can cause an accident. Always clean it up

at once

when you have time

at the end of the day

at the end of the period

1

When you work with laboratory chemicals and bunsen burners, long hair must be

cut off

kept out of the way by wearing a hair tie, band, or net

held with both hands

styled nicely

1

What is the smallest particle into which an element can be divided and still be the same substance?

electron

neutron

proton

atom

1

What part of the atom has a positive charge?

electron

neutron

proton

atom

1

What part of the atom has a negative charge?

electron

neutron

proton

atom

1

What part of the atom has a no charge?

electron

neutron

proton

atom

1

What is found in the center of an atom

electron

nucleus

library

electron cloud

1

What subatomic particles are found in the nucleus? Check all that apply

proton

electron

neutron

1

On a drawing a proton is shown with the symbol____?

(+)

(-)

(0)

1

On a drawing a electron is shown with the symbol____?

(+)

(-)

(0)

1

An electron is found...

inside the nucleus

next to a proton

outside the nucleus

next to a neutron

1

The main parts of an atom are?

proton, neutron, electron

proton, atom, electron

proton, compound, electron

1

Isotopes are atoms of the same element with the same number of protons and

a different number of electrons

a different number of molecules

a different number of neutrons

the same number of neutrons

1

What is the maximum number of electrons that are allowed on the second shell/orbit?

9

7

8

3

1

An atom becomes negatively charged by

gaining an electron

losing an electron

losing a proton

gaining a neutron

1

Potassium has an atomic number of 19 and a mass number of 39. So, it has _________________neutrons.

19

18

20

21

1

Which statement is true about the Periodic Table?

The Periodic Table allows you to easily compare the properties of one element to another

Each horizontal row of the Periodic Table is called a group

Each vertical column of the Periodic Table is called a period

All of the above are correct

1

In the Periodic Table, the vertical columns that extend down the Periodic Table are called

periods

groups

classes

1

Hydrogen is located in Group_________of the Periodic Table.

1

2

3

4

1

Which scientist is credited with inventing the Periodic Table?

Gregor Mendel

Watson and Crick

Albert Einstein

Dimitri Mendeleev

1

In the Modern Periodic Table, the elements are arranged in order of

increasing mass

increasing atomic volume

increasing atomic number

the alphabet

1

Copper

1

Fluorine

Give the element name that matches the symbol below.

1

Au

1

Ge

1

2

Select the general properties of metals:

Metals are shiny

Metals conduct electricity very well

Metals are flexiable

1

What is an example of an exothermic reaction?

A lightbulb

The sun

A firecracker

Vinegar and baking soda

1

Endothermic reactions release energy stored in chemical bonds.

Tačno

Netačno

1

A balanced equation demonstrates...

The law of conservation of energy

There was an exothermic reaction

Energy has neither been created or destroyed

There is the same amount of atoms on both side of the equation

The law of conservation of mass

2

State one way that you could speed up the rate of a chemical reaction.

1

What characteristics do endthermic reactions have? (select all that apply)

Aborb heat

Temperature increases

Release heat

Temperature decreases

1

What characteristics do exothermic reactions have? (select all that apply)

Absorb heat

Temperature increases

Releases heat

Temperature decreases

1

Select two examples of endothermic reactions.

Cooking an egg

Melting ice cubes

Wood burning

Explosive dynamite

1

Select two examples of exothermic reactions.

Baking soda and vinegar reacting

Hand warmers

Wood burning

Photosynthesis

	Electron	Neutron	Proton
NOT found in the nucleus
Has no charge
Has +1 charge
Has -1 charge
Identifier of the element
Has almost no mass

	Electron	Neutron	Proton
NOT found in the nucleus
Has no charge
Has +1 charge
Has -1 charge
Identifier of the element
Has almost no mass

Chemical reactions

Where is most of the mass of the atom found?

Which statement best describes the image.

Explain why you chose your answer for #2.

Select the type of subatomic particle that matchs the statement.

If you see something in the classroom or laboratory that is dangerous, tell the teacher

Any spill on the floor can cause an accident. Always clean it up

When you work with laboratory chemicals and bunsen burners, long hair must be

What is the smallest particle into which an element can be divided and still be the same substance?

What part of the atom has a positive charge?

What part of the atom has a negative charge?

What part of the atom has a no charge?

What is found in the center of an atom

What subatomic particles are found in the nucleus? Check all that apply

On a drawing a proton is shown with the symbol____?

On a drawing a electron is shown with the symbol____?

An electron is found...

The main parts of an atom are?

Isotopes are atoms of the same element with the same number of protons and

What is the maximum number of electrons that are allowed on the second shell/orbit?

An atom becomes negatively charged by

Potassium has an atomic number of 19 and a mass number of 39. So, it has _________________neutrons.

Which statement is true about the Periodic Table?

In the Periodic Table, the vertical columns that extend down the Periodic Table are called

Hydrogen is located in Group_________of the Periodic Table.

Which scientist is credited with inventing the Periodic Table?

In the Modern Periodic Table, the elements are arranged in order of

Copper

Fluorine

Au

Ge

Select the general properties of metals:

What is an example of an exothermic reaction?

Endothermic reactions release energy stored in chemical bonds.

A balanced equation demonstrates...

State one way that you could speed up the rate of a chemical reaction.

What characteristics do endthermic reactions have? (select all that apply)

What characteristics do exothermic reactions have? (select all that apply)

Select two examples of endothermic reactions.

Select two examples of exothermic reactions.

Where is most of the mass of the atom found?

Which statement best describes the image.

Explain why you chose your answer for #2.

Select the type of subatomic particle that matchs the statement.

If you see something in the classroom or laboratory that is dangerous, tell the teacher

Any spill on the floor can cause an accident. Always clean it up

When you work with laboratory chemicals and bunsen burners, long hair must be

What is the smallest particle into which an element can be divided and still be the same substance?

What part of the atom has a positive charge?

What part of the atom has a negative charge?

What part of the atom has a no charge?

What is found in the center of an atom

What subatomic particles are found in the nucleus? Check all that apply

On a drawing a proton is shown with the symbol____?

On a drawing a electron is shown with the symbol____?

An electron is found...

The main parts of an atom are?

Isotopes are atoms of the same element with the same number of protons and

What is the maximum number of electrons that are allowed on the second shell/orbit?

An atom becomes negatively charged by

Potassium has an atomic number of 19 and a mass number of 39. So, it has _________________neutrons.

Which statement is true about the Periodic Table?

In the Periodic Table, the vertical columns that extend down the Periodic Table are called

Hydrogen is located in Group_________of the Periodic Table.

Which scientist is credited with inventing the Periodic Table?

In the Modern Periodic Table, the elements are arranged in order of

Copper

Fluorine

Au

Ge

What group is column 2

What Group is Column 17?

What Group is Column 18?

Why does Tungsten have a chemical symbol W?

Select the general properties of metals:

What is the bunsen burner used for?

The utility clamp and the iron ring can both be attached to help hold beakers, test tubes, and flasks.

You do not need to wear safety glasses if you have eye glasses or contacts.

It is ok to put your hand on the pan if you want to know how much it mass it has.