How many valence electrons does calcium have?

2

5

3

8

7

1

4

6

Kendra conducts an experiment. She mixes two chemicals, resulting in a chemical reaction. Based on Kendra's experiment, what can be concluded about the original matter before mixing?

During which phase of the moon do spring tides typically occur

What volumeof hydrogen at stp by the reaction of 67.3

Which element has an equal number of electron pairs and of unpaired electrons within orbitals of principal quantum number 2?

I am studying physical and chemical changes right now and in my book it says that chemical reaction involve bond making and bond breaking and that in physical reaction there is no bond breaking/making ...

What is the square root of 54554? What is the square root of 35654?

Halogens have ... Electron affinity

Observe: Change the Surface area from Minimum to Maximum. You can imagine that a solid reactant has been dissolved in a liquid. How does this change how many Reactant B molecules are exposed to Reactant A?

When placed in a 200-mL square box, a substance has a spherical shape and has a volume of 75 mL When placed in a 200-mL circular tube, the same amount of that same substance has a spherical shape and a 75-mL volume.

What is the example to the word camouflage