How does litmus paper identify a base?

True or false. elements in the same period have the same number of valence electrons

Tool that can be used to find direction of magnetic field

What happens to an electron during an electron transition? A. The electron gains mass and falls into the nucleus of the atom. B. The electron flows between continuous energy levels when it gains or loses energy. C.

One of the several oxides of tin found in the earthâs crust is 78.77% by mass tin. what is its empirical formula and name?

Ora had a chemical splash into her eyes. She immediately told her teacher and went to the eyewash station. She then proceeded to wash her eyes out until they no longer hurt, which took about ten minutes.

When does a spring tide take place? At the beginning of spring Only during the spring season Only after spring is over At any time

The highest cloud are known as

What is the mass of 4.85 X 10^22 atoms of iron (Fe) ?

If element x has 95 protons how many electrons does it have

Which of the following when dissolved in deionized water would make a good conducting solution? a) methanolb) sugarc) baking soda