Introduction to Chemistry

The elements on the periodic table are organized by what?

• Atomic Number

• Phone Number

• Prime Number

An element’s atomic number is also equal to how many of these particles an element has?

• Electrons

• Neutrons

• Protons

Which element has 11 protons?

• Sodium

• Magnesium

• Potassium

• Calcium

Tags

NGSS.MS-PS1-1

Which element has 19 electrons?

• Sodium

• Magnesium

• Potassium

• Calcium

Which answer(s) describe the word "property" as it relates to chemistry? (CATA)

• a unique quality of a substance

• a characteristic of a form of matter

• a way to describe a substance

Tags

NGSS.MS-PS1-2

What is the smallest unit of an element that retains the properties of that element?

• Molecule

• Atom

• Compound

• Mixture

All of the following are examples of physical properties EXCEPT:

• boiling point

• melting point

• shape

• color

• reacts with air

Match the following

• 2 or more elements

• heterogeneous

• varies throughout

• homogeneous

• same throughout

• compound

• pure substance that can't be broken down

• element

A ​ (a)   is a material made from atoms of two or more combined elements.

• compound

• element

• chemical

• mixture

What is the main difference between a compound and a mixture?

• Compounds are made of one type of atom, mixtures are not

• Compounds are chemically combined, mixtures are physically combined

• Compounds can be separated by physical means, mixtures cannot

• Compounds are always solids, mixtures are always liquids