Flashcards
C1.1 Flash cards
Flashcards do conjunto (24)
- 1Where are electrons found in an atomShells or energy levels around the nucleus
- 2What is the charge on a proton+1
- 3What is the charge on a neutron0
- 4What is the charge on an electron-1
- 5What do the number of electrons equalThe number of protons
- 6What does the mass number of an atom equalNumber of protons + number of neutrons
- 7What is the atomic number equal toThe number of protons
- 8If an element is in Group 1, how many electrons does it have in its outer shellOne
- 9Why does magnesium have the same chemical properties as calciumBoth are in Group 2 which means they both have two electrons in their outer shell
- 10What is the name of Group 0The noble gases
- 11Are group 0 elements reactive or unreactiveUnreactive
- 12What is special about the outer shell of electrons for all of the elements in Group 0They are full of electrons
- 13What is a compoundTwo or more different elements chemically joined together e.g sodium chloride
- 14To make compounds the electrons can be given away or ......Shared
- 15Compounds formed from metals and non-metals are made up of......Ions
- 16Compounds formed from non-metals are often called....Molecules
- 17Molecules are made up of atoms joined together by ___________ bondsCovalent
- 18During a chemical reaction the mass of the reactants always equals .......The mass of the products
- 19What is an element?A substance with only one sort of atom e.g. iron
- 20About how many elements are there100
- 21What does the Periodic Table contain? Atoms, Elements, Compounds or Mixtures?Elements
- 22A group contains elements with similar ..........Properties
- 23Where in an atom is the nucleus?At the centre
- 24What particles are found in the nucleus?Protons and neutrons
Informações
- Descrição
- FlashCards sobre C1.1 Flash cards, criado por SJ_ em 23-05-2013.
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- SJ_
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