Advertisements
Advertisements
Question
Name the metalloids in the first twenty elements.
Advertisements
Solution
B (Boron), Si (Silicon).
RELATED QUESTIONS
What is the number of valence electrons in the atoms of first elements in a period?
The atomic numbers of the three elements X, Y and Z are 2, 6 and 10 respectively.
(i) Which two elements belong to the same group?
(ii) Which two elements belong to the same period?
Give reasons for your choice.
Name two elements in Inert gas.
Give the symbol and valency of the following element and radical.
Potassium
Give the symbol and valency of the following element and radical.
Carbonate
State the number of elements in Period 1 of the Periodic Table.
Which of the following statements about the Modern periodic table is correct?
Noble gases belong to______ group of the periodic table.
______ and ______ are called inner transition elements.
Which of the following elements does not lose an electron easily?
