I think it is going to be 3
i tried my hardest and its not aExplanation:
The correct answer is the second option; sodium (Na) and potassium (K.)
Both sodium and potassium have the same number of valence electrons.
Radioactive decay happens when an unstable atomic nucleus spontaneously changes to a lower-energy state and spits out a bit of radiation. This process changes the atom to a different element or a different isotope
According to the number of bonds present in a methane molecule, in the combustion of one methane molecule, four C-H covalent bonds are broken.
<h3>How many bonds are broken in a methane molecule?</h3>
A methane molecule is composed of four atoms of hydrogen and one atom carbon.
The formula of a methane molecule is CH4.
The bonds present in methane molecule are four C-H covalent bonds.
Therefore, in the combustion of one methane molecule, four C-H covalent bonds are broken.
Learn more about about methane at: brainly.com/question/25419929
