Vocab
What is a Crystalline solid?
Solids that repeat patterns and are made up of crystals.
Is a boiling egg a physical change?
No
When you mix baking soda and vinegar is that a chemical change?
Yes!
The up and down columns on the periodic table are called what?
The groups/families
What is a amorphous solid?
A type of solid that has no real pattern.
What is sublimation?
A transition from a solid to a gas.
Melting Ice
physical!
Batterires
They are chemical
What does the atomic number on the periodic table represent?
The number of protons and electrons in a atom
What is a valence electron?
Electrons that have the highest energy.
What is the Law Of Conservation Of Mass?
Matter can not be created or destroyed.
When you dissolve salt in water is that a physical change?
YES
bending a metal wire is that a chemical change
no that is a physical
How many groups are in the periodic table?
18
What is an alloy?
A mixture made of two or more elements, at least one of which is a metal.
What is a molecular compound?
A compound that is made up of molecules.
when you wash your hands is it a chemical change, Physical change, both, or neither
the answer is both it has both chemical and physical
baking a cake is it a chemical change?
yes it is
What are the elements in group 1 known as?
Alkali Metals
What is surface tension?
An inward force, pull among the molecules in a liquid that brings the molecules on the surface closer together.
What is activation energy?
The minimum amount of energy needed to start a chemical reaction.
Is Cutting paper a physical change?
Yes
Crushing a can is it a chemical change
no it is a physical
What are the names of the group 17 elements?
What is a covalent bond?
The chemical bond formed when 2 atoms share electrons.