An <u>electron cloud</u> is often thought of as a region of space in which there I a high probability of finding an electron.
In an atom, there is a "cloud" around the nucleus that contains all of the electrons. This is the place with the highest chance of finding an electron.
The second one is correct. Alleles on homologous chromosomes determine traits
Answer:
Group 1A
Explanation:
The Alkali metals all end is S1. What period the element is in determines the 1st number. Example: : H ends 1s1