Modern periodic table and electron configuration
I can describe the way the modern periodic table is organised and draw the electronic configuration of the first twenty elements.
Modern periodic table and electron configuration
I can describe the way the modern periodic table is organised and draw the electronic configuration of the first twenty elements.
Lesson details
Key learning points
- The periodic table is ordered by increasing atomic number (proton number).
- The periodic table is split into periods and groups.
- The position of an element in the periodic table is linked to its atomic number and the arrangement of its electrons.
- Elements can be classed as metals or non-metals according to their position on the periodic table.
- A useful model for atoms arranges electrons in shells around the nucleus.
Keywords
Electron shell - is an energy level outside the nucleus which contains electrons.
Electronic configuration - of an atom of an element describes how the electrons are arranged in shells.
Period - is a horizontal row on the periodic table, it corresponds to the number of shells of an atom in an element that have electrons in them.
Group - is a column on the periodic table that corresponds to the number of electrons in the outer shell of an atom.
Common misconception
Pupils often confuse the atomic number and mass number with regard to the number of electrons in an atom. They also can confuse the number of electrons which can be held by each shell.
Emphasise that the lower number (atomic number/proton number) represents the number of electrons (reference to the mass being larger can help). Practise as many electron arrangements as possible.
Licence
Lesson video
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Prior knowledge starter quiz
6 Questions
Q1.Which of these subatomic particles are located in shells around the nucleus of an atom?
Q2.How many protons does an atom of carbon have?
Q3.An atom has 12 protons and 12 neutrons. What is its mass number?
Q4.True or false? You can find out how many electrons are in a neutral atom of each element by looking at the periodic table.
Q5.An element has 16 electrons. Based on its electronic arrangement, determine whether it is more likely to be a metal or a non-metal.
Q6.Place the following models of the atom in chronological order based on their development, starting from the earliest to the latest:
Assessment exit quiz
6 Questions
Q1.Which group in the periodic table contains elements with a full outer electron shell?
Q2.How many electrons can the first shell of an atom hold (maximum)?
Q3.Which of the following statements about the periodic table is FALSE?
Q4.Identify the group number for elements with electronic configuration ending in 2,7.
Q5.Write the electron configuration of calcium (separate each number by a comma ",")
Q6.Write the element's symbol below for the element represented in this electron configuration diagram.
