Flashcards
Module 2.1 Atoms
Flashcards do conjunto (21)
- 1What are atoms?The smallest particle of a chemical element that can exist.
- 2How many types of atoms are there?118 known types.
- 3How many atoms are natural?98 atoms.
- 4How many atoms are man made?20 atoms.
- 5What are molecules?A group of atoms bonded together, representing the smallest fundamental unit of a chemical compound that can take part in a chemical reaction.
- 6What is a crystal lattice?The symmetrical three-dimensional arrangement of atoms inside a crystal.
- 7What is a element?A substance made up of one atom.
- 8What is an anion?An ion that has more electrons than protons and is negatively charged.
- 9What is a cation?An ion that has fewer electrons than protons and is positively charged.
- 10What is a proton?a stable subatomic particle occurring in all atomic nuclei, with a positive electric charge equal in magnitude to that of an electron.
- 11What is a neutron?a subatomic particle of about the same mass as a proton but without an electric charge, present in all atomic nuclei except those of ordinary hydrogen.
- 12What is a subamotic particle?The particles an atom is made up of protons, neutrons and electrons.
- 13What is an electron?A small negatively charged particle ; clouds of electrons surround the nucleus of an atom.
- 14What is an atomic number?The number of protons in a nucleus; the atomic number determines what type of atom it is.
- 15What is a mass number?The number of protons and neutrons in an atom.
- 16What is an ion?An atom that has gained or lost an electron.
- 17What is nucleus?A cluster of neutrons and protons at the centre of the atom.
- 18What is the force that attracts electrons to the nucleus?Electrostatic attraction
- 19What is the force that makes protons repel each other?Electrostatic repulsion
- 20What is the force that holds protons together in the nucleus?Nuclear force
- 21—
Informações
- Descrição
- Year 9 Sciences FlashCards sobre Module 2.1 Atoms, criado por Addna Dahir em 02-05-2018.
- Criado por
- Addna Dahir
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