Identify which element is the cation and which is the anion.

Which choice(s) of the following have 18 electrons O Scandium3+ O Calcium O Argon Argon ion O Chlorine O Silicon

tion of the Perlodic Table Tamera v Read each description in the first column of the table below. If any chemical element with atomic number of 92 or less matches the description, check Yes and enter the chemical symbol of an element that matches. Otherwise check No in the second column. Does any element with zS 92 match the description? If you checked yes, give the symbol of an element with ZS 92 description that matches. An element in Period 6 and Group 4A. O Yes O No A metalloid in Group 8A. O Yes O No An alkaline earth metal with a higher atomic number than astatine. O Yes O No A main-group element in Period 2. O Yes O No Explanation Check 2021 McGraw-Hill Education. All Rights Reserved. Terms of UseI Privacy I Accessibility O v I 11:57 acer page vp -> esc backspace delete %23 24 % & 6. 7 8 9 2 3 e 国山国

Radon-222 (222Rn) has recently received publicity because its presence in basements may increase the number of cancer cases in the general population, especially among smokers. State the number of electrons, protons, and neutrons that make up an atom of 222Rn.

Atom/ion Hydrogen atom (H) Oxide ion (0²-) Hydrogen ion (H+) Nitrogen atom (N) Nitride ion (N³-) Sodium atom (Na) Sodium ion (Na+) Number of protons 1 8 7 9 4 16 Positive charge +1 +8 +7 Number of electrons 1 10 10 2 Negative charge -1 -10 Overall charge of atom or ion 0 2- 2-