The atom of an element X has 7 electrons in its M shell

(a) Write the electronic configuration of element X.

(b) What is the atomic number of element X?

(c) Is it a metal or a non-metal?

(d) What type of ion will be formed by an atom of element X? Write the symbol of the ion formed.

(e) What could element X be?

Which f the following statement is always correct?

From the symbol <ιμγωιδτη=∀31∀ηειγητ=∀32∀σρχ=∀Χη−4_Στρυχτυρε−οφ−Ατομ−1_φιλεσ/ιμαγε009.πνγ∀>, state:

(i) mass number of phosphorus,

(ii) atomic number of phosphorus, and

(iii) electron configuration of phosphorus.

An atom of element E contains 3 protons, 3 electrons and 4 neutrons:

(a) What is its atomic number?

(b) What is its mass number?

(c) Write the electronic configuration of the element E.

(d) State whether element E is a metal or non-metal. Why?

(e) What type of ion, cation or anion, will be formed by an atom of element E? Why?

(f) Write the symbol of the ion formed by an atom of element E.

(g) What could element X be?

An atom of an element X may be written as .

(a) What does the figure 9 indicate?

(b) What does the figure 4 indicate?

(c) What is the number of protons in atom X?

(d) What is the number of neutrons in atom X?

(e) What is the number of electrons in atom X?

(f) How many electrons are there in the outermost shell of an atom of element X?

(g) Write the symbol of ion formed by an element Z is 2, 8, 8.