21 Best Periodic Table Questions and Answers (Q&A) - ProProfs Discuss

What is the relative formula mass of Mg(OH)2?

N. Kingsley, Writer
Answered: Aug 23, 2018

The relative formula mass is calculated by adding up all the different atomic masses of the atoms present. The mass needs to be multiplied by the number of atoms present respectively. For...Read More

1 Answer

2831 views

What is the most likely atomic radius of element Yy?

E.Ronald
Answered: Jan 03, 2018

An element can’t be broken down any further. They are considered to be the smallest part of matter. The atomic mass of an element is the mass or weight of an element or atom. Inside of the...Read More

2 Answers

1509 views

Which pair of elements belong to the same groups in the periodic table?

W. Pratt, Marketing Analyst
Answered: Feb 26, 2019

The elements in the question are as follows based on the periodic table: A=9 (Fluorine or F), B=11 (Sodium or Na), C=17 (Chlorine or Cl), D=12 (Magnesium or Mg), and E=13 (Aluminum or...Read More

2 Answers

997 views

What is the symbol for Potassium?

Malcolm Carneal, Digital Nomad
Answered: Jul 30, 2018

Potassium is known to be a chemical element that has the symbol K. This element has a chemical number of 19. There are a lot of people who do not realize just how important potassium ions are....Read More

3 Answers

972 views

What is the atomic mass of the element in period 2, group 13?

Bobby Rickets, Content Reviewer
Answered: Dec 14, 2018

The atomic mass of the element in period 2, group 13 of the periodic table of elements is 10.81. This group of chemical elements on the periodic table is called boron. In this group you can also...Read More

2 Answers

960 views

Which element would be the better conductor of heat and electricity, Neon or Cobalt?

John Adney
Answered: Jul 12, 2017

Cobalt is a transitional element or metal which has coloured ions and has many oxidation numbers

2 Answers

852 views

What cannot be true for metalloids?

Jagran josh
Answered: Dec 24, 2024

They are good conductors of heat and electricity

1 Answer

814 views

Which element is more reactive, Potassium or Krypton?

John F. connor, Content Marketing executive
Answered: May 10, 2019

There are many elements on the periodic table. All of these elements are different in various capacities. Krypton is an element on the periodic table that many people who are not knowledgeable...Read More

2 Answers

757 views

Which Period and Group in the Periodic Table does it belong to?

Mr_wong
Answered: Dec 24, 2024

Period 5; Group 0

The correct answer is Period 5; Group 0. The atom has valence shell n = 5, hence it belongs to Period 5. In the valence shell, there are 2+6 = 8 valence electrons,...Read More

1 Answer

641 views

What is the relative formula mass of (NH4)2CO3?

John Smith
Answered: Dec 24, 2024

96

(14 + 1 x 4) x 2 + 12 + 16 x 3 = 102

1 Answer

565 views

Which things are not listed in the periodic table?

C. Perez, Writer
Answered: Jun 13, 2019

The correct answer to this question is the atomic Orbital radius. Also known as Bohr radius, the atomic orbital radius is a constant, which is physical. It is unit of length, and a0 and Bohr are...Read More

2 Answers

504 views

What is a negatively charged ion called?

John Smith
Answered: Dec 24, 2024

Anion, ANION, Anion

1 Answer

502 views

Which option is applicable to complete the following sentence?

H. callum, Content Writer
Answered: Feb 07, 2019

The correct answer to this question is C. As you move down an element group (column), the size of atoms increases. This is because each atom further down the column has more protons and neu...Read More

3 Answers

417 views

Where would you locate the element with electronic configuration 2, 8 in the modern periodic table ?

L. Brett, Sales Manager
Answered: Jun 07, 2019

The correct answer to this question is Group 18. This group is the Noble Gases. They have many characteristics which make them stand apart from other elements. These include the fact that they...Read More

3 Answers

404 views

What is the element having the largest atomic radius?

Kumarans
Answered: Dec 24, 2024

1 Answer

361 views

Periodic Table Questions and Answers (Q&A)

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