Question

use your knowledge of the periodic table, atomic number, and mass number to complete the following table. symbol identity atomic # electrons neutrons charge 41 19 +1 23 30 +2 * arsenic 36 40 21 ne^0

Explanation:

Step1: Identify element from atomic number

The atomic number is the number of protons in an atom. For the first row, the atomic number is 19, which corresponds to potassium (K).

Step2: Calculate number of electrons for ion

For a +1 ion, the number of electrons is one less than the number of protons. Since the atomic number (number of protons) is 19, the number of electrons is \(19 - 1=18\). The number of neutrons is the mass - number minus the atomic number. Given mass - number 41 and atomic number 19, the number of neutrons is \(41 - 19 = 22\).

Step3: Identify element from atomic number for second row

The atomic number is 23, which corresponds to vanadium (V).

Step4: Calculate number of electrons for +2 ion

For a +2 ion with atomic number 23, the number of electrons is \(23- 2 = 21\).

Step5: Identify element from name for third row

Arsenic (As) has an atomic number of 33. For a neutral - like species with 36 electrons, it has a charge of \(33 - 36=- 3\).

Step6: Analyze neon isotope

The symbol \(^{21}Ne^{0}\) indicates neon (Ne) with atomic number 10. The number of electrons for a neutral atom is equal to the atomic number, so there are 10 electrons. The number of neutrons is \(21 - 10 = 11\), and the charge is 0.

Answer:

Symbol	Identity	Atomic #	Electrons	Neutrons	Charge
\(V^{2 +}\)	Vanadium	23	21	30	+2
\(As^{3-}\)	Arsenic	33	36	40	- 3
\(^{21}Ne^{0}\)	Neon	10	10	11	0