Science Worksheets

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|Name:________________________________ |Index Number: ( ) |Class: _____ |

LEARNING CHECKLIST:

Are you able to:

▪ state that atoms are made up of protons, neutrons and electrons ▪ state that the number of protons in an element determines what element it is

The proton number / atomic number is unique to that __________ .

▪ state the relative charges and approximate relative masses of a proton, a neutron and an electron

Draw a table to put in the respective information:

▪ describe, with the aid of diagrams, the structure of an atom as containing protons and neutrons (nucleons) in the nucleus and electrons arranged in shells

Draw and label the Bohr model:

▪ define proton (atomic) number and nucleon (mass) number

Fill in the labels:

12.0
6C

▪ define the term isotopes

Isotopes are

▪ deduce the numbers of protons, neutrons and electrons in atoms and ions given proton and nucleon numbers

This atom has 9 protons. Write down the 1) nucleon number

2) formula of its ion

▪ describe the relationship between group number, number of valence electrons and metallic/non-metallic character

Draw a table to help you.

▪ describe metallic bonding in terms of a lattice of positive ions surrounded by mobile electrons ▪ describe the structure of metallic substances
▪ relate the physical properties of metals to their structure and bonding

Draw the metallic structure, Describe the structure and Define the metallic bond

▪ describe ionic (electrovalent) bonding, including the use of ‘dot-and-cross’ diagrams ▪ describe the structure of ionic substances
▪ relate the physical properties of ionic substances to their structure and bonding ▪ write the formula for ionic compounds

Draw the ionic structure, Describe the structure and Define the ionic bond

Draw the dot and cross diagram for the ionic compound, BaCl2

Write the formula for : Calcium carbonate _____________, Potassium phosphate ____________

Write the names for: Al(OH)3 ____________, CoCl2 ______________, NH4F ______________

▪ describe the formation of a covalent bond by the sharing of a pair of electrons in order to gain the electronic configuration of a noble gas ▪ describe, using ‘dot-and-cross’ diagrams, the formation of covalent bonds between nonmetallic elements, e.g. H2; O2; H2O; CH4; CO2

▪ deduce the arrangement of electrons in other covalent molecules ▪ relate the physical properties (including electrical property) of covalent substances to their structure and bonding ▪ Compare the structure of simple molecular substance (e.g. methane, iodine) with those of giant molecular substances (e.g. poly(ethene), sand, diamond, graphite) in order to deduce their properties; ▪ Compare the bonding and structures of diamond and graphite in order to deduce their properties such as electrical conductivity, and lubricating or cutting action;

▪ Deduce the physical and chemical properties of substances from their structures and bonding, and vice versa

Complete the following table

| |Simple covalent |Giant covalent | |Examples | | | | | | | |Description of structure | | | | | | | |...
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