60 pairs, because A and T are pairs, and C and G are pairs, and since there are only 2 different pairs, they both have to add up tobe 100, so 100-40=60
<h2>Answer:</h2>
In the periodic table, the elements of the same group and elements of the same column, have similar reactivity because they have a similar configuration in their valence electrons.
There are some factors which determine the chemical properties if an element of the periodic table.
- No. of arrangement of electron in an atom.
- No. of valence electrons.
- Arrangement of electrons.
Answer:
by heating it on. high fire makes it fast to coook meat
Improving soil usage is important because healthy soil helps turn dead matter and minerals into plant nutrients , Improving soil usage helps as a protection against droughts
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