Chem test 2 Flashcards
(10 cards)
Explain why elements in Group 1 have similar reactions.
They all have 1 electron on their outer shell that they lose in reactions.
A small piece of sodium is added to a large trough of water
State two observations that could be made.
- Fizzing
- Melts into a ball and moves around surface quickly
State one observation that could be made when a small piece of potassium is added to a large trough of water, but would not be observed with sodium.
burns lilac / purple flame
statement about lithium
It is a good electrical conductor and forms a basic oxide
What is the colour of chlorine at room temperature?
Green
Astatine is another element in Group 7.
Predict its colour and physical state at room temperature
colour - black
physical state- solid
The elements in Group 7 have similar chemical reactions because they have the same number of…
…outer electrons
State why the teacher does not add bromine solution to sodium bromide solution.
They are the same element and have the same reactivity so there will be no displacement reaction
The word equation for the reaction of bromine with
sodium iodide is
bromine + sodium iodide -> iodine + sodium bromide
Write a chemical equation for this reaction.
Br(2) + 2NaꞮ
-> Ɪ(2) + 2NaBr
The elements in the Periodic Table are arranged in order of…
atomic number
