QUESTION Identify the cation:
(a) Oxygen
(b) Chlorine
(c) Sulphur
(d) Sodium
GIVE THE CORRECT ANSWER ONLY.
Answers
(i) 2Na+Cl
2
→2NaCl
Sodium and chlorine atoms come together to form sodium chloride (NaCl). NaCl is an ionic compound because of the strong electrostatic forces of attraction between positively charged Na metal cations and negatively charged Cl non-metal anions.
(ii) C+2S→CS
2
Carbon disulfide (CS
2
) is made by the reaction of carbon and sulphur. Since electronegativity of C and S is almost same so it is a covalent compound.
(iii) S+O
2
→SO
2
Sulphur reacts with oxygen to give sulphur dioxide (SO
2
). Sulfur dioxide bond is of covalent bonding since sulphur and oxygen are both non-metals.
(iv) Ca+H
2
→CaH
2
Calcium hydride (CaH
2
) is an ionic compound that is formed when calcium metal reacts with hydrogen gas.
Explanation:
Old age refers to ages nearing or surpassing the life expectancy of human beings, and is thus the end of the human life cycle. Terms and euphemisms include old people, the elderly, OAPs, seniors, senior citizens, older adults, and the elders.