Flashcards
1.2 Atoms
Flashcards do conjunto (18)
- 1What is an element?A substance that is made of only one type of atom
- 2What do groups in the periodic table show?Elements with similar properties
- 3Describe structure of an atomSmall central nucleus which is made up of protons and neutrons and around which there are electrons
- 4What is the relative electrical charge of protons?+1
- 5What is the relative electrical charge of neutrons?0
- 6What is the relative electrical charge of electrons?-1
- 7In an atom, what is the number of electrons equal to?The number of protons in the nucleus
- 8Do atoms have an overall electrical charge?No
- 9What is the atomic number of an element?The number of protons
- 10What is the mass number of an element?The sum of protons and neutrons in an atom
- 11What do all atoms of a particular element have the same number of?Protons
- 12What are isotopes?Atoms of the same element with different numbers of neutrons
- 13What do electrons occupy?Particular energy levels
- 14Do the electrons in an atom occupy the highest or lowest available energy level?Lowest
- 15What is the mass of a proton?1
- 16What is the mass of a neutron?1
- 17What is the mass of an electron?Very small
- 18What is the relative atomic mass of an element?It compares the mass of atoms of the element with the 12C isotope
It is an average value for the isotopes of the element
Informações
- Descrição
- GCSE Chemistry (.1 The fundamental ideas in chemistry) FlashCards sobre 1.2 Atoms, criado por Anisha Rai em 20-04-2016.
- Criado por
- Anisha Rai · abr 2016
- Atualizado
- 19 mai 2016
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- 11
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