please answer these the one who does it i will mark as brainlyest
Q.1. How will you find the valency of chlorine, sulphur and magnesium.
Q.2. If number of electrons in an atom is 8 and the number of protons is also 8, then
(i) What is the atomic number of the atom? And
(ii) What is the charge on the atom?
Q.3. Define Isotopes. Write two examples of Isotopes.
Q.4. Define Isobars. Write one example of isobars.
Q.5. State one use of radioactive Isotopes of medicine
Q.6. What name is given to the pair of atoms such as 14
7 N ?
Q.7. The atomic number of an element X is 16.
(a) Write down the electronic configuration of X
(b) What will be the valency of X?
Q.8. The mass number of an element is 18. It contains 7 electrons. What is the number of protons and neutrons in it?
Q.9. Explain the following with one example of each
(i) Atomic number (ii) Mass number
Q.10. Na+ has completely filled K and L shells. Explain
please answer them all
Answers
1. With the no. of electrons in outer most shell
2. (i) 8 is the atomic number
(ii) Neutral because there is a balance of both the electrical charges
3. All isotopes of a given element have the same number of protons but different numbers of neutrons in each atom. Ex: Proterium, Deuterium
4. Isobars are atoms (nuclides) of different chemical elements that have the same number of nucleons. Ex: 40 S, 40 Cl
5. cobalt-60 is extensively employed as a radiation source to arrest the development of cancer. Other radioactive isotopes are used as tracers for diagnostic purposes as well as in research on metabolic processes.
6. Isotopes
7. (i) Electronic configuration is 2, 6, 8
(ii) Valency is 0 as its in octet state
8. Protons are 8 and neuteons are 7 (Neutrons =Mass no. -Protons
9. (i) Identity of he atom Ex: Hydrogen is 1
(ii) Mass no. is mass of the atom and its 1 for Hydrogen again
10. KLMN are maim shells of the atom, so it filled both of them and each shell has SPDF again
I answered all of them...