Vocabulary

A student passes a magnet over 10 grams of a powder. Four grams of the powder stick to the magnet, while 6 grams do not. Which of these identifies the substance?

• element

• compound

• mixture

• solvent

a substance (as gold, tin, copper, or bronze) that has a more or less shiny appearance, is a good conductor of electricity and heat, and usually can be made into a wire or hammered into a thin sheet

• reactivity

• metalloids

• non-metals

• metals

The small numbers written below the symbol that tells you how many atoms there are

• coefficient

• atom

• subscript

• chemical formula

• element
• compound
• mixture of elements and compounds
• mixture of compounds

Tags

NGSS.MS-PS1-1

Which one of these pictures represents a pure substance? 

• 1 and 2

• 1 and 3

• 2 and 3

• 1, 2 and 3

Tags

NGSS.MS-PS1-1

subatomic particles found on the outermost shell & responsible for the atom's reactivity

• neutrons

• valence electrons

• isotopes

• ions

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

The smallest particle in a chemical element or compound that has the chemical properties of that element or compound.

Tags

NGSS.MS-PS1-1

Two or more substances that are not chemically combined with each other and can be separated by physical means.  The substances in the mixture retain their individual properties.

Any number of chemical elements, such as iron or copper, that are often ductile solids and good conductors of heat and electricity.

Smallest possible unit into which matter can be divided, while still maintaining its properties