Matter and Energy

During a game, students were asked to select the correct symbol with the element. All of the following answers would be correct EXCEPT —

• Na — sodium

• H — helium

• O — oxygen

What is the smallest part of an element?

• compound

• atom

• molecule

Jane saw the letter P on a container in the science lab. Which element was MOST likely found in the container?

• sodium

• nitrogen

• phosphorus

Which item listed below is NOT considered an element?

• calcium

• phosphorus

• water

Which of the following lists contains only elements and a reason why they are elements?

• H2O, NaCl, N2, CO2 – Substances are elements because they contain more than one chemical symbol.

• F2, O3, Li, H – Substances are elements because they all have chemical symbols

• C12, H2, Na, He - Substances are elements because they are pure.

Tags

NGSS.MS-PS1-1

Which of the following examples most closely represents what it means to be an element?

• A brick wall made from many identical bricks.

• A salad made of lettuce, tomatoes, cucumbers, and dressing.

• A gum ball machine with many different colors and sizes of candy inside

Tags

NGSS.MS-PS1-1

Julian is using the chemical formulas for various substances to classify them as either a compound or an element. Which of the following should he identify as an element?

• Co

• CO

• CO2

Ryan is using the chemical formulas for various substances to classify them as either a compound or an element. Which of the following should he identify as a compound?

• Fe

• Co

• CO

Tags

NGSS.MS-PS1-1

Rebecca is using the chemical formulas for various substances to classify them as either a compound or an element. How should Rebecca classify Gold (Au)?

• Gold is a compound composed of a blend of substances.

• Gold is a compound composed of a pure substance.

• Gold is an element composed of a pure substance.

The instructions for a lab warned students to avoid putting Na in the liquid used during the experiment. What element should not be placed in the liquid?

• nitrogen

• sodium

• silicon