What are three chemical changes and what are three physical changes?

A neutral isolated atom has a ground state configuration of 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 3d 3. Identify the element. 1. The question cannot be answered unless the atomic weight is known. 2. Argon (Ar). 3. Vanadium (V). 4. Phosphorus (P). 5.

When a person uses an iron to remove the wrinkles from a shirt, why does heat travel from the iron to the shirt?

Which unit of pressure expresses standard atmospheric pressure as 1?

What are the coefficients that will balance the skeleton equation below? n + h ⟶ nh?

If one meter equals 100 million years than what does 1 cm equal to?

There are two stable isotopes of bromine. Their masses are 78.9183 and 80.9163 amu. If the average atomic mass of bromine is 79.9091 amu, what is the natural abundance of the heavier isotope? percent abundance of 81Br __%

If 1.00 mol of argon is placed in a 0.500-L container at 20.0 ∘C, what is the difference between the ideal pressure (as predicted by the ideal gas law) and the real pressure (as predicted by the van der Waals equation) ? For argon, a=1.

Which of these is a covalent compound? 1. AICI3 2. CO 3. MgO 4. LiCI

What is a protein used for

Atoms of the halogen family typically steal two electrons from other atoms when they react true or false