Flashcards
Atoms
Cards in this deck (24)
- 1AtomsBy: Hamza Ahmed Yr 8
- 2Where does the word 'atom' come from?It comes from 'atomos', a word used by Democritus to describe the smallest particles of matter that could not be divided.
- 3What is a scientific model?A simplified idea that can be used to help make predictions or test assumptions.
- 4Who developed the atomic theory of matter?John Dalton
- 5What is the atomic theory of matter?1. Each element is composed of atoms
2. All atoms of a given element are
the same
3. Atoms can't be created or destroyed but can be rearranged to form different substances
4. Compounds are made up of more than one type of atom - 6What are atoms made up of?Subatomic particles
- 7What are the subatomic particles?Protons, neutrons, electrons
- 8How do these particles make up an atom?The protons and the neutrons are at the centre in the nucleus while the electrons form a cloud around the nucleus.
- 9Why are the electrons bound to the nucleus?They have a negative charge and the protons have a positive charge.
- 10What is the total charge of an atom?Zero
- 11Why?The number of protons and electrons are the same
- 12What is the charge of protons?Positive
- 13What is the charge of electrons?Negative
- 14What is the charge of neutrons?Neutral
- 15Atomic numberThe number of protons in an atom
- 16Mass numberThe number of protons and neutrons
in an atom - 17What determines a type of atom?The number of protons in it
- 18What symbol calculates the number of protons, neutrons and electrons in an atom?The 7 represents the mass number and the 3 represents the atomic number
- 19How do you calculate the number of protons in an atom?Looking at the atomic number
- 20How do you calculate the number of electrons in an atom?It is the same as the protons because the charge of the atom is the same
- 21How do you calculate the number of neutrons in an atom?Mass number - atomic number
- 22What are electron shells?The structure of the electron cloud
- 23How many layers are there?3
- 24How many electrons can they each hold?1st=2
2nd=8
3rd=18
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- Description
- These are flashcards on atoms. Hope you enjoy.
- Created by
- Hamza Ahmed
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