How many atoms of each element make up a molecule of baking soda, NaHCO 3 ?

sodium = 1 hydrogen = 1 carbon = 1 oxygen = 3

sodium = 6 hydrogen = 6 carbon = 6 oxygen = 6

sodium = 1 hydrogen = 1 cobalt = 4

nitrogen = 1 hydrogen = 1 cobalt = 3

Physical Change or Chemical Change: squeezing an orange

Physical because you are just changing the shape.

Chemical because a new substance was created

This is the chemical equation showing the reaction between vinegar and baking soda. NaHCO 3 + C 2 H 4 O 2 → NaC 2 H 3 O 2 + H 2 O + CO 2 Which of the following is true based on this information?

some of the substances disappeared and left others behind

This is the chemical equation showing the reaction between vinegar and baking soda. NaHCO 3 + C 2 H 4 O 2 → NaC 2 H 3 O 2 + H 2 O + CO 2 How do you know this is a chemical change?

The starting and ending substances have different properties

The starting and ending substances have the same properties

the starting substances have the same properties

the starting substances have different properties

Why is the below picture an example of a physical change?

The materials making up the pencil did not change

The pencil is a different color

What are the three states of matter?

physical change, chemical change, solution

qualitative data, quantitative data, beaker

creates a new substance with a different combination of bonded atoms.

changes the physical properties of an object, but does not create a new substance.

Unit 1A Review: Elements, Compounds, Changes TEKS 7.6ABC

Authored by Lauren Murphy

Science

7th Grade

NGSS covered

Used 56+ times

Unit 1A Review: Elements, Compounds, Changes TEKS 7.6ABC

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Element or Compound: CO₂

Element

Compound

Tags

NGSS.MS-PS1-1

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Element or Compound: Sn

Element

Compound

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Element or Compound: S₈

Element

Compound

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Element or Compound: NH₃

Element

Compound

Tags

NGSS.MS-PS1-1

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Element or Compound: NaHCO₃

Element

Compound

Tags

NGSS.MS-PS1-1

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Element or Compound: Co

Element

Compound

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Element or Compound: Combinations of two or more types of atoms

Element

Compound

Tags

NGSS.MS-PS1-1

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