Atoms and Elements
What is the chemical formula for Carbon dioxide?
CO2
What method of separation separates an insoluble solid from a liquid?
Filtration.
Name 3 properties of metals.
Malleable
Sonorous
High melting/boiling point
Good conductors of electricity
Melting.
Give an example of an acidic and alkaline substance in everyday life.
Acidic - Lemon juice, fizzy drinks etc.
Alkali - Baking soda, cleaning products etc.
What 3 subatomic particles are found in an atom?
Protons, Neutrons and Electrons
What method of separation is often used in forensic science as it separates different components in a mixture (e.g. different inks in a pen)?
Chromatography.
Name 3 properties of non-metals.
Poor conductors of electricity
Low melting/boiling points
What is the process called when a liquid turns into a gas?
Evaporation/boiling.
If something is pH 2, is it acidic or alkaline? And is it strong or weak?
Strongly acidic.
Which subatomic particle have a neutral charge?
Neutrons.
What method of separation separates a mixture of different liquids based on their boiling points?
Distillation.
Who is known as the 'father' of the periodic table?
A) Mendeleev
B) Einstein
C) Netwon
A) Mendeleev
What is the process called when a gas turns into a liquid?
What pH value represents a neutral solution?
What is the chemical formula for water?
H2O
What is the difference between a pure and impure substance?
Pure - only 1 type of element or compound
Impure - mixture of different elements or compounds
How are elements arranged in the periodic table?
Increasing atomic number.
Which state of matter has a fixed shape and volume?
Solid.
Name an example of a neutral substance in everyday life.
Milk and water.
What is the difference between a compound and a mixture? )Think about if the substance is chemically bonded or not?)
Compounds: 2 or more elements that are chemically bonded.
Mixtures: 2 or more substances that are not chemically bonded (can be physically separated).
Here are 2 substances: Gold and Seawater
Which is pure and which is impure?
Pure - Gold
Seawater - Impure
What is the difference between a physical and chemical property of an element?
Physical - Characteristics that can be observed or measured.
Chemical - How a substance reacts with other substances.
Which state of matter generally has the highest density?
Solids.
What does an indicator do in chemistry?
Tells us the pH/ how acidic or alkaline a substance is.