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How does density change down group 1?
How does melting point change down group 1?
How does melting point change down group 7?
How does reactivity change down group 7?
How does melting point change down group 8?
What colour is chlorine gas?
What state of matter does bromine exist in at room temperature?
Which of these are a property of the halogens?
They are all unreactive
They exist as gases
They are monoatomic molecules
They are diatomic molecules
Which statement best describes the trends going down group 7?
The BP and MP both decrease
The BP and MP both increases
The BP increases but the MP decreases
The BP decreases but the MP increases
Which of these is NOT a property of group 1 elements?
They are soft and can be cut with a knife
They corrode rapidly when exposed to oxygen in the air
They produce an acidic solution when reacted with water
They produce hydrogen when reacted with water
Which property of an element increases across the period table?
Number of electron shells
Number of outer electrons
Tendency to form positive ions
Which statement about the periodic table is correct?
elements in the same period have the same number of outer electrons
the elements on the left are usually gases
the most metallic elements are on the left
the relative atomic mass increases from right to left