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  1. Chemistry
  2. Periodic Table

Periodic Table Questions and Answers (Q&A)

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

988 views
What is the atomic mass of the element in period 2, group 13?
Bobby Rickets, Content Reviewer
Answered: Dec 14, 2018
The answer is B. 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...Read More

2 Answers

492 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

473 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

387 views
What is a negatively charged ion called?
John Smith
Answered: Oct 01, 2020
Anion, ANION, Anion

1 Answer

336 views
What cannot be true for metalloids?
Jagran josh
Answered: Oct 01, 2020
They are good conductors of heat and electricity

1 Answer

335 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

323 views
What is the relative formula mass of (NH4)2CO3?
John Smith
Answered: Oct 01, 2020
96

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

1 Answer

323 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

301 views
Which Period and Group in the Periodic Table does IT belong to?
Mr_wong
Answered: Oct 01, 2020
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

256 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

232 views
Which of the following, Fluorine, Chlorine, Bromine cannot be the identity of Y?
John Smith
Answered: Oct 01, 2020
Fluorine-you got tricked!The answer is a. fluorine.why??? Shouldnt the more reactive halogen displace the less reactive ones? Heres why. from question 7, you know that fluorine is the most powerful...Read More

1 Answer

232 views
What property of Z does this show?
John Smith
Answered: Oct 01, 2020
It has variable oxidation states.-the answer is b. it has variable oxidation states.. the oxidation states of z increases from +2 in zo to +3 in z2o3, which exmplifies its variable oxidation states...Read More

1 Answer

225 views
What do the elements have in common?
John Smith
Answered: Oct 01, 2020
They all have valence electrons in the f-orbitals.-the answer is d. by working out the electronic configurations of some of the elements, you will realize that they all have valence electrons in the...Read More

1 Answer

212 views
Why is IT that the reactivity of Group I metals increases down the group?
John Smith
Answered: Oct 01, 2020
Atomic radius increases down the group.-c. atomic radius increases down the group is the answer.this is because the greater the atomic radius, the further away the valance electrons, hence the...Read More

1 Answer

207 views

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