Category 1& 2 Benchmark Review

Which of the following describes a neutron?

• positive charge, found inside the nucleus and has a mass of 1amu

• no charge, found inside the nucleus and has a mass of 1amu

• negative charge, found surrounding the nucleus and has a mass of less than 1amu

Which statement(s) describe metals? select all that apply.

• found on the left side of the zig-zag.

• found on the right side of the zig-zag

• can be pulled into a long wire.

• can be shaped without breaking

What is the best evidence that a chemical reaction has occurred?

• two liquids were mixed and a solid formed.

• two substances were mixed and the temperature increased.

• two substances were mixed and it created bubbles.

• two substances were mixed and it created a new substance with different properties.

Tags

NGSS.MS-PS1-2

Look for Fluorine on the periodic table. Which of the following statements about fluorine is true?

• Fluorine has 9 protons in its nucleus and is not very reactive because it has 7 valence electrons in its outer shell.

• Fluorine has 19 protons in its nucleus and is very reactive because it has 7 valence electrons in its outer shell.

• Fluorine has 9 protons in its nucleus and is very reactive because it has 7 valence electrons in its outer shell.

• Fluorine has 10 protons in its nucleus and not very reactive because it has 7 valence electrons in its outer shell.

Tags

NGSS.MS-PS1-1

Look at the compound in the answer choices below. Which compound contains the most number of oxygen atoms?

• (CH₃)₂ CO

• CdSO₄

• CaSO₄ 2H₂O

• NH₄OH

Tags

NGSS.MS-PS1-1

The table shows the density of different known substances. The mass of the copper was 200 grams.

Using the mass and density chart, calculate the volume. Round to the hundredth.

• 1780 cm³

• 0.04 cm³

• 170.94 cm³

• 22.47 cm³

Tags

NGSS.MS-PS1-2

Find boron, aluminum, and gallium on your periodic table. How many valence electrons do each of these elements have?

• 13

• 2

• 3

• 4

Which of the following is not an example of a physical change that can be observed in the kitchen.

• cutting onion

• burning the bread

• melting butter

• crushing garlic

Look at the equation. Which of the following statements is false?

• There are 8 total atoms of oxygen on the reactants side of the equation.

• There are 6 total atoms in the product side of the equation.

• There are 3 total atoms of oxygen in the product side of the equation.

• There are 6 total atoms of oxygen in the reactants of the equation.

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Use your periodic table to determine the identity of the element and chemical reactivity. This element has 15 protons, 16 neutrons, and 5 valence electrons.

• oxygen, reactive

• phosphorus, highly reactive

• oxygen, unreactive

• phosphorus, reactive