BJU 11 Chemistry

What is a pure substance that cannot be broken down into any other substance by physical or chemical means. Ex: Gold, Silver, Oxygen, & Nitrogen

• element

• compound

• mixture

• salad

What is an atom which has gained or last electrons called?

• isotope

• atom

• ion

• balanced

What type of property can only be observed by changing the substance into a new substance. Ex: Flammability, oxidation

• chemical

• physical

Tags

NGSS.MS-PS1-2

Air is an example of a(n)

• element

• compound

• heterogenous mixture

• homogenous mixture

Phase changes (going from a solid to a liquid to a gas) are what types of changes?

• chemical

• physical

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Elements in a compound can be separated __________

• physically

• chemically

Tags

NGSS.MS-PS1-5

who developed the modern day periodic table of elements?

• Darwin

• Shultz

• Hooke

• Mendeleev

On the Periodic Table each element increases by one _________

• electron

• proton

• neutron

• letter

A row across the Periodic Table where each element has the same number of energy shells

• column

• family

• period

In a family or column, the elements have similar properties because they all have the same number of

• protons

• neutrons

• valence electrons

• electrons