Answer:
There are two dots are present on the left side of calcium atom which represents the unpaired electrons present in the outermost shell. This structure is presented by Lewis in order to show the number of unpaired electrons in the atom.
Explanation:
Answer: Climate change increases carbon in our atmosphere affecting the water. 97% of earth is ocean so the cO goes into the water creating the acidification. killing coral and plankton
Answer:
B
Explanation:
Because a ball falling down is a good strong force
1. <span>The region in which an electron is most likely to be found is called an orbital.
2. </span>An atom in which an electron has moved to a higher energy level is in an excited state.
3. When Mendeleev organized elements in his periodic table in order of increasing mass, elements with similar properties were in the same column.
4. Mendeleev’s periodic table was useful because it enabled scientists to predict properties of unknown elements.