An element X has 7 electrons in its L shell. What is true about the el

1.	An element X has 7 electrons in its L shell. What is true about the element X? I. It belongs to period 9 of modern periodic table. II. Its atom contains 9 protons. III. It has a valency of 7. IV. Its atoms can accept an electron to acquire noble gas configuration.
Answer» An element X has 7 electrons in its L shell. What is true about the element X? I. It belongs to period 9 of modern periodic table. II. Its atom contains 9 protons. III. It has a valency of 7. IV. Its atoms can accept an electron to acquire noble gas configuration.

An element X has 7 electrons in its L shell. What is true about the element X? I. It belongs to period 9 of modern periodic table. II. Its atom contains 9 protons. III. It has a valency of 7. IV. Its atoms can accept an electron to acquire noble gas configuration.

Answer»

An element X has 7 electrons in its L shell. What is true about the element X?

I. It belongs to period 9 of modern periodic table.

II. Its atom contains 9 protons.

III. It has a valency of 7.

IV. Its atoms can accept an electron to acquire noble gas configuration.