How can chemicals mix?
A mixture of substances where a liquid is able to absorb another substances.
What is a solution?
Mixtures of chemicals can be separated by _______ and _______ techniques.
What is physical and chemical?
What is the chemical symbol of hydrogen?
What is H?
What is the small number written below an element in a chemical formula?
What is the number of atoms of that element in the molecule?
Group number and period number of helium.
What is Group 18 and Period 1?
Some liquids mix together well, some do not, such as oil and water.
What is immiscible?
A method that can be used to separate a suspension of a liquid and a solid, where the solid removed is called the residue and the liquid, filtrate.
What is a filtration?
We name simple chemical compounds by using _______________.
What is a chemical formula?
What is the relative molecular mass of H₂O?
What is 18?
The relative mass of an electron
What is 0.00054?
This mixture of mud and water is ___. As the river gets closer to the sea, it gets wider and flows slower. When this happens, the mud settles to the bottom.
When the mixture consists of a solid substance that is dissolved in the solvent, what type of separation technique is usually used?
What is evaporation?
The first element named in a compound is usually this type of element.
What is a metal?
What do you get when you add together the relative atomic masses of all atoms in a molecule?
What is the relative molecular mass?
Purest form of carbon
What is diamond?
In humans, sugars dissolve in the water in our blood to enable it to carry energy to our cells. Waste substances also dissolve in our blood and are removed. Water lines our lungs to enable oxygen to dissolve and be absorbed into our bloodstream. This is because water is a __.
What is solvent?
A separation technique where a liquid is boiled and the vapor is condensed to obtain a purer sample of said liquid.
What is distillation?
The prefix used for 4 atoms in a compound.
What is tetra-?
What is the relative molecular mass of Na₂CO₃?
(Na=23, C=12, O=16)
What is 106?
When was it discovered that atoms can decay from one element to another.
When is 1896?
Seawater is a solution. Each kg of seawater contains about 35g of ___ dissolved in it. Other elements such as __ and __ are also found dissolved in seawater.
What is sodium cholride, potassium, and bromine?
_________ _________ separates crude oil into different* substances(e.g. gasoline and diesel)
What is a fractional distillation?
The rule that determines which element is named first in a compound.
What is the element furthest to the bottom left on the periodic table?
How many atoms are in Ca(NO3)2
What is 9?
The chemical formula of FOOF (Hint: F is the chemical symbol of fluorine)
What is dioxygen diflouride?
*"FOOF" is the nickname of (O2F2)