Advertisements
Advertisements
Question
Elements X, Y and Z have atomic numbers 6,9 and 12 respectively. Which one:
- Forms an anion
- Forms a cation
Advertisements
Solution
- Y = 9
- Z = 12
APPEARS IN
RELATED QUESTIONS
Dalton said that ______ could not be divided.
The atomic number and the mass number of sodium are 11 and 23 respectively. What information is conveyed by this statement.
The atom of an element is made up of 4 protons, 5 neutrons and 4 electrons. What is its atomic number and mass number?
TRUE \ FALSE
After the emission of a beta-particle, the atomic number of the atom increases by one.
Fill in the blank of the following statement :
All the mass of an atom is concentrated in a small region of space called the ___________.
‘Valency is the number of hydrogen atoms which can combine with [or displace] one atom of the element [or radical] forming a compound’. With reference to the above definition of valency, state the valency of chlorine in hydrogen chloride, giving reasons.
Name the 3 sub-atomic particles of an atom.
‘A’ is denoted by ______.
Electrons revolve around the nucleus in definite open shells.
If an atom has 6 electrons in its outermost shell, it is inert.
