Flashcards
Atoms
Cards in this deck (15)
- 1What do all substances consist of?Atoms
- 2What is an element?A substance that is made of only one sort of atom
- 3How many elements are there?About 100
- 4What does the periodic table show?Elements
- 5What does a group in the periodic table show?Elements with similar properties
- 6How are atoms of each element shown?Atoms of each element are represented by a chemical symbol
- 7What are the features of an atom?Atoms have a small central nucleus, which is made up of protons and neutrons and around which there are electrons.
- 8What are the relative charges of protons, neutrons and electrons?Protons - +1
Neutrons - 0
Electrons - -1 - 9What charge do atoms have overall?They have no charge overall
- 10What is the difference between atoms of the same elements?They have a different amount of protons and electrons
- 11What is the atomic number?The number of protons in an atom of an element
- 12What is the mass number?The sum of the protons and neutrons in an atom
- 13What is a shell?An energy level which is occupied by electrons
- 14Where are electrons found?Electrons are found in energy levels, called shells, which surround the nucleus in an atom
- 15How many electrons are usually in the first three shells?1st shell - 2
2nd shell - 8 max.
3rd shell - 8 max.
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- GCSE Chemistry Flashcards on Atoms, created by Ayo Aderemi on 22/07/2016.
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- Ayo Aderemi
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