Category

Which element does this model represent?

• Nitrogen

• Hydrogen

• Carbon

• Boron

Tags

NGSS.MS-PS1-1

Four students were asked to complete a table for a science assignment. Each student selected one chemical element from each of four groups in the periodic table and then classified each element as a metal, nonmetal or metalloid. Which table was completed correctly?

• A

• B

• C

• D

Tags

NGSS.MS-PS1-1

Which pair of properties describes the elements in Group 18?

• they are chemically stable and liquid at room temperature

• they have eight valence electrons and are flammable

• they are magnetic and boil at low temperatures

• they are gaseous at room temperature and chemically stable

The periodic table is organized into groups and periods of elements. The characteristics of a certain group of elements are listed in the image.

Which of these elements is in this group:

• Lithium

• Strontium

• Aluminum

• Silicon

In this image, the information to the RIGHT of the arrow (in BLACK) is called the_______.

• Product

• Reactant

• Chemical Subscript

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

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

James is trying to balance a chemical equation for his science project. How can he achieve this?

• By changing the elements in the reactants

• By having the same elements and number of atoms on both sides, in the reactants and the products

• By adding more products

• By removing some reactants

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

Grace and Emma are conducting a science experiment where they mix two chemicals in a closed container. What principle explains why the total mass of the container remains the same before and after the reaction?

• Matter can be created and destroyed

• Matter can only be transformed, not created or destroyed

• Matter is always in a solid state

• Matter can change into energy

Tags

NGSS.MS-PS1-5

William was conducting an experiment in his science class. He mixed two clear liquids together and noticed bubbles forming. What does this indicate?

• Dissolving

• Cutting

• New gas formation/bubbles

• Freezing

Tags

NGSS.MS-PS1-2

• F

• G

• H

• J