Elements, compounds and mixtures. Flashcards
Investigations
It is an activity that resulted in finding information.
Investigations
It is an activity that resulted in finding information.
Observations
Information obtained by a person or by another source.
Alchemists
They are olden-day ‘chemist’ who mixed chemicals and tried to change ordinary metals into gold. Over the years alchemists also tried to tell the future but most of the time did not succeeded.
Scientists
They are smart people working in the fields of science.
Elements
It is a pure substance or object that is made up of one particular or type of atom.
Atoms
A small particle that make up of all things. Atoms have the same factors as the objects they are made of.
Atomic Number
It is the number of protons in the nucleus of the atom and the atomic number determines which element an atom it is.
Compounds
They are 2 or more atoms that are chemically bonded (joined) together.
Bonded
It is the force that joins or holds particles of matter such as an atom and a particle together.
Mixtures
It is a combination of substance or objects (items) which each keep it’s own properties or factors.
Hydrogen
It is the element with the smallest atom which is a colour less gas and combines with other elements to form a large number of substances such as water. Hydrogen is the most common element in living things.
Oxygen
A gas in the air (and water) that animals and human-beings need to breathe in to survive. Oxygen is made up of particles with two oxygen atoms which is chemically joined. Plants produce oxygen as part of photosynthesis to make animals and human-beings to survive.
Metals
It is a material or an element that conducts heat and electricity. Eg. Iron and Aluminum.
Non-metals
It is a material or an element that does not conduct heat and electricity. Eg. Oxygen and Nitrogen.
