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What is a group?
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What is a group?
A group is a vertical column on the Periodic Table.
What do periods in the Periodic Table indicate?
Periods indicate the number of electron shells in an atom.
How are elements arranged in the Periodic Table?
Elements are arranged by increasing atomic number in periods and groups.
True or False?
Each element has one proton more than the previous one.
True.
Each element has one proton more than the previous one.
What is a period?
A period is a horizontal row on the Periodic Table.
Why are elements arranged by increasing atomic number?
Elements are arranged by increasing atomic number so that they end up in columns with similar properties.
What do groups in the Periodic Table indicate?
Groups indicate the number of outer electrons in an atom.
True or false?
Magnesium is in Group 2 of the Periodic Table.
True.
Magnesium is in Group 2 of the Periodic Table.
True or false?
Chlorine is in Period 2 of the Periodic Table.
False.
Chlorine is in Period 3 of the Periodic Table.
True or false?
Elements in Group 1 lose electrons to form ions with a 1- charge.
False.
Elements in Group 1 lose electrons to form ions with a 1+ charge.
What charge do the ions formed by Group 7 elements have?
The charge of the ions formed by Group 7 elements is 1-.
What does the charge of an ion tell us?
The charge of an ion tells us the number of electrons an atom has lost or gained.
True or false?
Calcium atoms form ions with a 2+ charge.
True.
Calcium atoms form ions with a 2+ charge.
True or False?
Non-metals are poor conductors of heat and electricity.
True.
Non-metals are poor conductors of heat and electricity.
True or False?
Most elements are metals.
True.
Most elements are metals.
In terms of their physical state at room temperature, what is the difference between metals and non-metals?
In terms of their physical state at room temperature, metals are typically solid and non-metals can be gases or solids.
Mercury and bromine are exceptions as they are liquid at room temperature.
What properties are used to classify elements as metals or non-metals?
Properties that are used to classify elements as metals or non-metals include:
Conductivity.
Melting / boiling point.
Reaction with acid.
Type of oxide formed.
True or False?
Non-metals are typically malleable and ductile.
False.
Non-metals are typically brittle, while metals are typically malleable and ductile.
Where are non-metals generally located on the Periodic Table?
Non-metals are generally located on the right-hand side of the Periodic Table.
What type of oxide do metals normally form?
Metals normally form basic oxides.
Do metals or non-metals generally have low melting and boiling points?
Non-metals generally have low melting and boiling points.
True or False?
Non-metals react with acids.
False.
Non-metals do not generally react with acids.
State the characteristic properties of metals and non-metals.
Metals typically have high electrical conductivity, are malleable / ductile, react with acids and form basic oxides.
Non-metals typically have lower electrical conductivity, are brittle, do not react with acids and form acidic oxides.
True or False?
Elements in the same period have similar chemical properties.
False.
Elements in the same group have similar chemical properties because they have the same number of outer electrons.
Why do elements in the same group have similar chemical properties?
Elements in the same group have similar chemical properties because they have the same number of outer electrons.