How many electron does a neutral atom of calcium have

Sam is heating water on the stove for his science experiment. How will he know when it is boiling? A. It will be warm. B. There will be bubbles forming in the water. C. The water will turn bluish. D. The temperature will rise to 80 degrees Celsius.

What is it called when a consume wastes and dead organisms?

Which is not an example of a vestigial structure

The wavelength of light that has a frenquency of 1.20x10^13s^-1

If hydrogen bonds between water molecules were, collectively, not as strong as they are, how would this affect plant height?

Explain the processes of convergence and divergence

How do the electrons in bonds (bonding domains) differ from lone pairs (non-bonding domains) ?

Сколько граммов соли образуется, если в раствор, содержащий 9,8 г серной кислоты, добавим другой раствор, имеющего 10 г гидроксида натрия?

Why do scientific theories change?

How many atoms are present in 34.69 moles of Mg