Well, when an atom attains a stable valence electron, it means that the outer electrons are complete and so cannot attain any more electrons. For the first shell, it is complete when it has 2 electrons, the second shell is complete when it has 8 electrons, all the other shells also have a particular number when complete. Anyway, i believe the answer is HYDROGEN because when HYDROGEN combines with another atom of HYDROGEN, the outer shell is completed. This is because HYDROGEN has only 1 electron. If the two HYDROGENS, which both have 1 electron combine, they make the electrons 2, which is complete for the first shell, HYDROGEN ends in the first shell. Since the electrons become 2, the shell is at stable valence. In all the other options, this happens;
NEON- It has 10 electrons, 2 in the first shell and 8 in the second. So the the shells are already complete, so it can't bond with any thing, which is completely against the question.
RADON- Radon has 86 electrons.
HELIUM- Helium has 2 electrons, so the shell is already full, and cannot bond, so it goes against the question. The question says BY BONDING.
So the answer is definitely 4) HYDROGEN
Hope i helped. Have a nice day, by the way, i'm very sure it's hydrogen.
<span>1. Fill a beaker or graduated cylinder with enough water to completely immerse the sphere in. 2. Record the baseline initial measurement. 3. Drop the sphere in. 4 <span>Record final measurement.</span></span>
Explanation:
Which of the following is not a postulate of the kinetic molecular theory?
Answer is
option D. the collisions between gas molecules are elastic
<em>Hope</em><em> </em><em>it</em><em> </em><em>will</em><em> </em><em>help</em><em> </em><em>you</em>
The average relative atomic mass of a sample containing 100 atoms of X, 70 were found to be 9X while 30 were 11X isotopes is 9.6g.
<h3>What is Atomic mass? </h3>
Atomic mass is defined as the whole mass of an atom.
It is also defined as the sum of atomic number and number of neutrons.
Atomic mass = Atomic number + neutrons
<h3>What is Isotopes?</h3>
Isotopes are the those element which have same atomic number but have different mass number and number of neutrons.
The average relative atomic mass can be calculated as
mass of isotopes/ mass of sample
mass of all isotopes = (70 × 9X) + (30 × 11X)
=(630 + 330) X
= 960X
Average relative atomic mass = 960X/ 100 X
= 9.6 g
Thus, we concluded that the average relative atomic mass of a sample containing 100 atoms of X, 70 were found to be 9X while 30 were 11X isotopes is 9.6g.
learn more about atomic mass:
brainly.com/question/14250653
#SPJ9
