Elements and Compounds (1)
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How many elements are there on the periodic table?
118
What is an element?
An element is a pure substance that cannot be broken down into any other substance.
Every element is made up of its own type of atom, true or false?
TRUEEEEEEE ITS TRUE WOMAN
Wheys an atom bredda?
Atoms are the smallest units of matter that still retain the chemical properties of an element.
why are chemical elements all very different from each other?
We did this already boss I hope you get it Every element is made up of its own type of atom
The atoms in a particular element are….?
The atoms in a particular element are the same as each other. Elements are made up of only one kind of atoms!!!!!
What are some elements which exists as single atoms?
-Metals { Iron- Fe, Copper-Cu, Aluminium-Al} -inert/noble gases such as helium (He), neon (Ne), argon (Ar)
What is a molecule?
Some elements exist as molecules. In general, a molecule is made up of two or more atoms of the same kind or of different kinds, chemically combined together.
Molecules of elements consist….
Molecules of elements consist of a FIXED number of ONE KIND of atom only.
What is an example of a molecule?
Oxygen: each molecule of oxygen gas is made up of TWO oxygen atoms CHEMICALLY COMBINED together.
What is a compound?
A compound is a substance that contains atoms of two or more different elements, and these atoms are chemically joined together.
What is an example of a compound?
Water- water is a compound of hydrogen and oxygen.
What does each molecule of water always contain?
Each molecule of water will ALWAYS contain two hydrogen atoms and one oxygen atom.