Science STAAR Category Two

Does this chemical equation follow the Law of Conservation of Mass?

• Yes

• No

• I don't know

• Maybe

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Read the following chemical formula: C₆H₁₂O₆. How many hydrogen atoms are in the formula?

• 12

• 6

• 4

Tags

NGSS.MS-PS1-1

How many Magnesium atoms are in 10MgCl₂?

• 10

• 5

• 20

Tags

NGSS.MS-PS1-1

Which of the following is an example of a chemical reaction?

• A marshmallow turning black when heated over a fire

• A powder dissolving in water to make lemonade

• An ice cube melting into a puddle of water

• Salt crystals being crushed into a powder
  

Tags

NGSS.MS-PS1-2

How many neutrons does the an element with an atomic number of 3 and a mass of 6.9 contain?

Tags

NGSS.MS-PS1-1

A horizontal row of elements in the periodic table

• Molecule

• Period

• Family

• Atom

What is one way Neutrons are different from electrons?

• they both are negative

• neutrons have no charge, while electrons have a negative charge

• Both are in the nucleus( center of atom)

• Electrons are inside nucleus and neutrons are outside the nucleus.

Tags

NGSS.MS-PS1-1

2H₂ + O₂ ----> 2H₂O What is the product?

• ------>

• 2H₂O

• 2H₂+ O₂

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What is the chemical symbol for Lithium?

• H

• He

• Li

• N

The number at the top of each square on the periodic table is the ...

• atomic number

• atomic mass

• Chemical Symbol

• Element Name