Chemistry
Use the letters only written in the Periodic Table given below to answer the questions :
| I | II | III | IV | V | VI | VII | O | |
|---|---|---|---|---|---|---|---|---|
| 1 | L | |||||||
| 2 | Q | E | G | J | Z | M | ||
| 3 | R | |||||||
| 4 | T |
(i) State the number of valence electrons in atom J.
(ii) Which element shown forms ions with a single negative charge?
(iii) Which metallic element is more reactive than R?
(iv) Which element has it's electrons arranged in four shells?
Periodic Table
ICSE 2016
98 Likes
Answer
(i) Atom J has 5 valence electrons as it belongs to the fifth group in the periodic table.
(ii) M forms ions with a single negative charge as it has 7 electrons in the valence shell and obtaining one more electron completes it's octet.
(iii) Metal T is more reactive than R because elements at the bottom of the group are more reactive.
(iv) T has it's electrons arranged in 4 shells as it belongs to 4th period.
Answered By
58 Likes
Related Questions
Identify the term in each of the following :
(i) The tendency of an atom to attract electrons to itself when combined in a compound.
(ii) The electrons present in the outermost shell of an atom.
Write the correct symbol > (greater than) or < (less than) in the statements :
(i) The ionization potential of potassium is ………. that of sodium.
(ii) The electronegativity of iodine is ………. that of chlorine.
Fill in the blanks by selecting the correct word :
(i) If an element has a low ionization energy then it is likely to be ………. (metallic/non metallic).
(ii) If an element has seven electrons in it's outermost shell then it is likely to have the ………. (largest/smallest) atomic size among all the elements in the same period.
Select the correct answer — The energy required to remove an electron from a neutral isolated gaseous atom and convert it into a positively charged gaseous ion is called ………. (electron affinity, ionization potential, electronegativity)