Q148CP - Chemistry: Molecular Nature Of Matter And Change

Question

Choose the box colour (s) in the periodic table below that match(es) each of the following:

                   

(a) Four elements that are nonmetals 

(b) Two elements that are metals

(c) Three elements that are gases at room temperature 

(d) Three elements that are solid at room temperature 

(e) One pair of elements likely to form a covalent compound 

(f) Another pair of elements likely to form a covalent compound 

(g) One pair of elements likely to form an ionic compound with the formula MX 

(h) Another pair of elements likely to form an ionic compound with the formula MX 

(i) Two elements likely to form an ionic compound with the formula M₂X 

(j) Two elements likely to form an ionic compound with the formula MX₂

(k) An element that forms no compounds 

(l) A pair of elements whose compounds exhibit the law of multiple proportions 

(m) Two elements that are building blocks in biomolecules 

(n) Two elements that are macronutrients in organisms

Step-by-Step Solution

Answer

The elements which is described are listed.

(a) Black, green, red and purple

(b) Blue and brown elements

(c) Green(chlorine), purple(argon) and red (oxygen)

(d) Black (carbon),brown (sodium) and blue (barium)

(e) Black (carbon) and red (oxygen)

(f) Black (carbon) and green (chlorine)

(g) Brown (sodium) and green (chlorine)

(h) Brown (sodium)  and red(oxygen)

(i) Brown (sodium)  and red(oxygen)

(j) Blue (barium) and green (chlorine)

(k) Purple(argon)

(l) Red(oxygen) and black (carbon)

(m) Red(oxygen) and black (carbon).

(n) Green and brown

Step 1: Finding that four elements that are non-metals

These elements can get on the right side of the periodic table. These are black, green, red and purple.

Step 2: Finding that two elements are metals

These can be found on the left side of the periodic table. They are blue and brown elements.

Step 3: Finding that three elements that are gases at room temperature

They are noble gases, non-metals and halogens. They are the elements of green(chlorine), purple(argon) and red (oxygen).

Step 4: Finding that three elements that are solid at room temperature

They are generally metals and a few non-metals are also solid. These are elements of black (carbon), brown (sodium) and blue (barium).

Step 5: Finding that one pair of elements likely to form a covalent compound

The pair of non-metals will form a covalent bond-like form between black (carbon) and red (oxygen).

Step 6: Finding that another pair of elements likely to form a covalent compound

The pair of non-metals will form a covalent bond-like form. Another pair can be black (carbon) and green (chlorine).

Step 7: Finding that one pair of elements likely to form an ionic compound with the formula MX

The ionic compound with the MX formula means the bond between an alkali metal (as it forms a monovalent cation) and halogen (as it forms a monovalent anion). They will have a charge of +1 and -1. These are the elements of brown (sodium) and green (chlorine).

Step 8: Finding that another pair of elements likely to form an ionic compound with the formula MX

They can have the charges of +2 and -2. These are the elements of red (oxygen) and blue (barium).

Step 9: Finding that two elements likely to form an ionic compound with the formula M 2 X

They have the charges of -2 (element from the oxygen family)  and +1 (alkali metal). These are the elements brown (sodium)  and red(oxygen).

Step 10: Finding that two elements likely to form an ionic compound with the formula MX 2

They have the charges of +2 (alkaline earth metal) and -1(halogen). They have the elements of blue (barium) and green (chlorine).

Step 11: Finding that the elements form no compounds

Noble gases have no reactivity due to the fully filled configuration. This is shown in purple(argon).

Step 12: Finding that a pair of elements whose compounds exhibit the law of multiple proportions

The elemental pair exhibit the multiple proportions law. They have the proportion of 1:1 and 1:2. They are the elements of red(oxygen)and black (carbon).

Step 13: Finding that two elements that are building blocks in biomolecules

The building blocks of biomolecules are red(oxygen) and black (carbon).

Step 14: Finding that two elements that are macronutrients in organisms

They are normally present in supplements of vitamins. They are green and brown elements