Periodic Table, Physical and Chemical Changes

What elements are in the chemical formula NH₃?

• Nitrogen and Hydrogen

• Sodium and Helium

• Nitrogen and Helium

• Sodium and Hydrogen

Tags

NGSS.MS-PS1-1

How many atoms of each element are there in the chemical formula NH₄Br?

• 4 nitrogen, 4 hydrogen, 1 bromine

• 1 nitrogen, 1 hydrogen, 4 bromine

• 1 nitrogen, 4 hydrogen, 1 bromine

• 4 nitrogen, 4 hydrogen, 4 bromine

Tags

NGSS.MS-PS1-1

Elements in the same group have similar properties. Which of the following elements will have similar properties?

• Lithium (Li) and Beryllium (Be)

• Carbon (C) and Silicon (Si)

• Helium (He) and Fluorine (F)

• Iron (Fe) and Cobalt (Co)

True or False: Elements can be found on the Periodic Table while compounds cannot.

• True

• False

True or False: The molecules in compounds can be made up of different elements.

• True

• False

Tags

NGSS.MS-PS1-1

What makes diamond the hardest naturally occurring mineral on Earth?

• Diamond's extended structure is bonded so weakly that it dissolves in water almost instantly.

• Diamond's extended structure is bonded so weakly that it breaks when anything touches it.

• Diamond's extended structure is bonded so strong that it melts everything it touches.

• Diamond's extended structure is bonded so strong that most things can't break it.

Tags

NGSS.HS-PS1-4

A chair leg being broken off is an example of a ________ change.

• physical

• chemical

A match being struck and burning is an example of a ________ change.

• physical

• chemical

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

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

• Change in color while still being the same object

• Change in shape

• Precipitate forming

• Change in the state of matter

Tags

NGSS.MS-PS1-2

Which of the following is an example of a physical change?

• Change in color as it becomes a new substance

• Change in shape

• Gases form as bubbles

• Change in temperature