Consider the two electron arrangements for neutral atoms A and B. What is the atomic number of A? A - 1s?, 2s 2p6,35
B - 1s2, 2s 2p, 5s

The difference between the atomic number of an element and the element’s atomic mass is the number of ions.

Acompound contains c, h, and o atoms. when 1.130 g of the compound is burned in oxygen, 1.064 g co2 and 0.3631 g h2o are produced. what is the empirical formula of this compound?

Which statement describes the phase change that occurs when dry ice is placed in an open container at room temperature?