What two things are not matter?
Light and Sound
What is the size of an atom in nm?
.1nm
Element
What year was the first periodic table formed?
1869
Group 1 is known as what?
An example of plasma is what?
The sun or lightening
Reactants
When two or more atoms chemically bond together, they form what?
Molecules
Is the following an example of chemical or physical properties:
mass, shape, state of matter
Physical properties
Protons have what charge?
Positive
Elements that are shiny and good conductors of electric current are called what?
Metals
Who came up with the first periodic table?
Dmitri Mendeleev
Group 13 is known as what?
Boron group
In what state of matter do atoms move the slowest?
Solid
In order for chemical reactions to occur what is needed?
Energy
A molecule that contains at least two different elements is called what?
Compound
Is the following an example of chemical or physical properties:
flammability, reactivity
Chemical Property
What particles are in the nucleus of an atom?
Protons and neutrons
Elements that have characteristics of both metals and non metals are called what?
Metalloid
Chemical symbol
What is group 17 called?
Halogens
An example of evaporation is what?
Sweating
Photosynthesis
What is an example of a combustion reaction?
Gas stove
Is the following an example of a physical or chemical change:
Baking a cake
Chemical change
What is the simplest atom?
Hydrogen
What element is used in wires and coins?
Copper
Columns on the periodic table are called what?
Groups
What element is used in batteries and electronics?
Dry ice is an example of what?
Sublimation
Rusting is an example of what type of reaction?
Exothermic
What law states that all elements present in the reactants must also be present in the products?
The law of conservation of mass
Is the following an example of a physical or chemical change:
Bending a paperclip
Physical change
How many protons does oxygen have?
8
Elements that can be hammered into thin sheets are said to be what (the answer is not metal)?
Malleable
How many periods are there on the periodic table?
7
Man made elements are also called what?
Synthetic elements
Pressure/elevation
Baking is an example of what type of reaction?
Endothermic
If there are 6 hydrogen atoms in the reactants, how many hydrogen atoms are there in the product?
6