Question

which of the following elements are non - metals (there may be more than one correct answer; select all that are correct)?
chlorine
boron
hydrogen
calcium
gallium
question 2
1 pts
there are protons and electrons in the cu+ ion.

Explanation:

Step1: Recall non - metal elements

Chlorine (Cl) is a non - metal in group 17 of the periodic table. Hydrogen (H) is a non - metal in group 1. Boron (B) is a metalloid. Calcium (Ca) is an alkaline earth metal in group 2. Gallium (Ga) is a metal in group 13.

Step2: Determine protons and electrons in Cu⁺

Copper (Cu) has an atomic number of 29, so the number of protons in Cu⁺ is 29 (atomic number = number of protons). A neutral Cu atom has 29 electrons, and since Cu⁺ has a + 1 charge (lost 1 electron), the number of electrons in Cu⁺ is 28.

Answer:

Chlorine, Hydrogen
29, 28