Elements

Presentation

•

Chemistry

•

9th - 12th Grade

•

Hard

James Gonzalez

FREE Resource

24 Slides • 18 Questions

Multiple Choice

Which of the following is the simplest form of substance?

solution

compound

element

mixture

Multiple Choice

Which of the following statements describes an element?

It contains only one kind of atom.

It can be decomposed by ordinary chemical means.

It is composed of atoms of two or more elements that bond together.

It has unique properties that are different from the properties of its individual elements.

Multiple Choice

Which of the following statements describes a compound?

It contains only one kind of atom.

It can be separated by physical means.

It cannot be decomposed into simpler types of substances.

It consists of atoms of two or more different elements bond together.

Multiple Choice

Which statement correctly explains the relationship between molecules and compounds

Both are made of 2 different atoms chemically combined

Both are made of at least 2 atoms, but compounds are 2 different atoms.

Molecules are made of one atom, compounds are made of 2 atoms

Both are made of at least 2 atoms, but molecules are 2 different atoms.

Multiple Select

Select all of the vocabulary words that describe oxygen gas (O₂).

Molecule

Compound

Element

Mixture

Multiple Select

Select all of the vocabulary words that describe water gas (H₂O).

Molecule

Compound

Element

Mixture

Multiple Choice

Compounds are two or more elements that are chemically bonded together.

True

False

Multiple Choice

Which of the following is a chemical compound?

CO₂

Multiple Choice

A compound is represented by a:

Heart

Atomic Mass

Atomic Number

Formula

Multiple Choice

What elements made up the compound Carbon dioxide?

Carbon and Oxide

Carbon and Oxygen

Carbon and Hydrogen

Carbon and Carbon

In this example, each molecule of water (a compound) has 2 hydrogens (subscript 2) and one oxygen atom (we do not write the subscript 1). The coefficient is 2 or 5. This tells us how many molecules of water we have.

We Count the number atoms using subscripts and coefficients.

Multiple Choice

Which of the following correctly identifies the subscripts and coefficients for the chemical formula?

Coefficients: 3, 4

Subscripts: 4

Coefficients: 4

Subscripts: 3, 4

Coefficients: 3, 4

Subscripts: 3, 4

Coefficients: 3

Subscripts: 3, 4

Multiple Choice

Challenge: How many total atoms are there in one molecule of aluminum sulfate?

C-1
H-4
O-1

How many of each element?

6 + 12 + 6 = 24

How many atoms total?

C₈N₄H₁₀O₂

What is the chemical formula for caffeine?

Multiple Choice

How many atoms of Oxygen are in a molecule of Sucrose?

Multiple Choice

How many hydrogen atoms would be in 2 molecules of Sucrose? (There will be twice as many as there are in 1 molecule)

Multiple Choice

How many sulfur atoms are there in 2 molecules of aluminum sulfate?

Matter is not created or destroyed in a reaction.
This is why we learn to count atoms in a compound.

Law of conservation of mass

Let's MIX things up a bit!

Mixture is not uniform.
Can see individual components
Salads, Vinegarettes,

Heterogeneous mixtures

The mixture is uniform.
Cannot pick out individual components.
Solutions and alloys

Homogeneous Mixture

Multiple Choice

Which of the following would be considered a homogeneous mixture?

Salad dressing

Salt water

Cereal with milk

Oatmeal

Mixtures can be separated by physical means.
No chemical reaction is necessary to separate mixtures.
Separating a compound requires a chemical reaction!

Multiple Choice

Which method should be used to separate a mixture of salt and water?

Manual separation

Boiling

Filtration

magnetatism

Why do chemical reaction occur?

When we perform chemical reactions, we are taking advantage of a substances instability, producing new products.

Multiple Choice

Another term for being chemically inactive is...

Inert

Inbert

Insert

Inmert

Show answer

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