Advertisements
Advertisements
Question
Elements X and Y have 1 and 7 electrons in their outermost shell respectively.
Which will form positive ion?
Advertisements
Solution
X
APPEARS IN
RELATED QUESTIONS
TRUE \ FALSE
Elements having a tendency to accept electrons are called metals
WRITE SHORT ANSWER
Define an ionic compound.
Write the names of the elements present in the:-
Glucose
Write the names of `"Ca"("NO"_3)_2` compounds :
Write the names of `"FeS"` compounds :
An atom has 13 protons and 14 neutrons.
How many electrons would be present in this atom ?
A certain particle ‘X’ has 17 protons, 18 electrons and 20 neutrons.
What is the charge on the particle ?
What is the usual symbol for (a) and electron (b) a proton, and (c) a neutron?
What are the building blocks of matter ?
Which of the following statement is correct about the atom of an element ?
Which has more atoms, 50 g of aluminium or 50 g of iron ? Illustrate your answer with the help of calculations.
(Atomic masses : Al = 27 u ; Fe = 25 u)
Give scientific reason.
All the mass of an atom is concentrated in the nucleus.
Deduce from the datum provided.
| Datum | To deduce |
| \[\ce{_11^23Na}\] | Neutron number |
| \[\ce{_6^14C}\] | Mass number |
| \[\ce{_17^37 Cl}\] | Proton number |
In what respects do the three isotopes of hydrogen differ? Give their structures.
A radical take part – unsplit in a chemical reaction and retains its identity in reactions.
With reference to the radical –
- ammonium
- bisulphate
- carbonate
state the group of atoms present in each radical.
The electronic structure [configuration] of fluorine can be written as 2, 7. In a similar way give the electronic configuration of phosphorus
An atom of an element has no electron. Will that atom have any mass or not? Can an atom exist without electron? If so then give example.
Define the following term with an example.
Non-metal
Atoms of different elements having the same number of ______ are called isotones.
The first scientific theory about atoms was given by J J. Thomson.
