Answer: A
Explanation:
Because we make hypothesis to find an answer to our observation or question. So if the Hypothesis is correct then the then a scientific explanation proves that a hypothesis is true. We also need more data and evidence to explain a scientific theory or question. A scientific expirement should be tested by many scientists to see if the results are correct. The more scientists aprove and the more evidence we have, the more correct our expirement is.
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Answer: The products usually weigh more than the reactants.
Explanation:
<u>Answer</u>:-
Try this formula:
W= Fd
F = W by d
Explanation:-
(Note: A newton-meter is the same thing as a joule, so the units for work are the same as those for energy – joules).
valence electrons are the number of electrons in the outermost shell.
electron configuration is where the electrons are arranged in ascending order of energy shells
the electron configurations for the elements given are as follows
C - 2,4
Al - 2,8,3
Na - 2,8,1
Ca - 2,8,8,2
from the given elements, Aluminium has 3 electrons in its outermost shell.
answer is Aluminium