Mention three particles inside an atom!
proton, neutron, electron
118 elements are being arranged in the Periodic Table in order of .....
Increasing in atomic (proton) number
What elements are located in one period with S and Cl?
Na, Mg, Al, Si, P
Elements in the same ..... show similarities in properties
group
Group shows us the number of ..... while period shows us the number of ....
group shows the number of electron in outer shell, period shows the number of shell
Mention three metalloid elements!
B, Si, As, Te, Po, At
What is the other name to represent the elements in Group VII?
Halogens
How many shells and electrons in outer shell does Calcium have?
4 shells and 2 electrons in outer shell
Hydrogen element belongs to which group in the periodic table?
No group
What is the charge of Potassium ion?
+1
How does an atom form a negative ion?
By gaining electron(s)
How does the reactivity of alkali metals going down the group?
It increases
How do we store the alkali metal elements?
Inside the oil
Which element of Group VII is the most reactive one?
Fluorine
Please mention one same properties for all elements in halogens!
They are all poisonous
What is the name of a group containing the most stable elements in the periodic table?
noble gases
