C2 1-structure and bonding 2.0 / 5 based on 2 ratings ? ChemistryStructure and bondingGCSECCEA Created by: Megan CowanCreated on: 29-01-13 21:03 when is a compound formed? when two or more elements react together 1 of 36 how do the atoms of elements join together? by sharing or transferring electrons 2 of 36 what do atoms of noble gases have? stable electronic structures 3 of 36 what is covalent bonding? when atoms of non-metallic elements join together 4 of 36 how can you tell that the compound H2O has covalent bonds? hydrogen and oxygen are both non-metallic elements 5 of 36 what is an ionic compound? when metallic and non-metallic elements join together 6 of 36 when a metal atom loses electrons what does it form? a positive ion 7 of 36 how do atoms form negative ions? they gain electrons 8 of 36 what attracts in the ionic compound to make ionic bonding? oppositely charged ions 9 of 36 how many electrons are on the outer shell of the atoms in the elements of group one elements? 1 10 of 36 how many electrons are on the outer shell of the atoms in the elements of group seven elements? 7 11 of 36 how do ionic bonds hold oppositely charged ions? together in giant structures 12 of 36 is a giant structure in an ionic compound regular? why? yes, all the ions pack together like marbles in a box 13 of 36 what acts in all directions in an ionic bond? electrostatic forces of attraction 14 of 36 what does the ratio of ions in a structure of an ionic compound depend on? the charges on the ions 15 of 36 what does a dot and cross diagram represent? atoms and ions involved in forming ionic bonds 16 of 36 what do you show in a dot and cross diagram? the electrons in the outer most shell of each atom or ion 17 of 36 what are ionic compounds? neutral, giant structures 18 of 36 what can we work out from knowing the charge on each ion in a compound? how? its formula by balancing the charges 19 of 36 how do we work out the charge on simple ions formed by elements in the main groups of the periodic table? from the number of the group. 20 of 36 give examples of ions made up of more than one element carbonate ions (CO3[2-]) or hydroxide ions (OH-) 21 of 36 what is the formula of an ionic compound? the simplest ratio of the ions in the compound and does not represent a molecule 22 of 36 write the formula for each of these compounds calcium flouride, sodium sulphate, magnesium nitrate, copper (ii) chloride, iron (iii) hydroxide 23 of 36 what is a covalent bond made up of? non-metals 24 of 36 what do the atoms of covalent bonds need to gain to achieve stable electronic structures? electrons 25 of 36 how do the atoms of covalent bonds gain electrons? by sharing electrons with other atoms 26 of 36 what are molecules? substances that have atoms held together by covalent bonding 27 of 36 how do atoms in group 7 form a single covalent bond? by gaining one electrons 28 of 36 how do atoms in group 6 form two covalent bonds? by gaining two electrons 29 of 36 what do many covalently bonded substances consist of? small molecules 30 of 36 what does a covalent bond act between? only the two atoms it bonds to eachother 31 of 36 how big are the atoms in a metallic element? all the same size 32 of 36 what do metallic elements form when they bond? giant structures in which layers of atoms are arranged in regular patterns 33 of 36 what happens to the outer electrons when metal atoms pack together? they delocalise and can move freely between atoms 34 of 36 what do delocalised electrons produce? a lattice of positive ions in a 'sea' of moving electrons 35 of 36 what do delocalised electrons strongly attract? the positive ions and hold together the giant structure 36 of 36
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