What charge does a nitride anion always have? O-1 O-2 O-3 O -4

Which of the following is true of the halogens in periods two and three when comparing them to other elements in the same period? O Halogens have higher ionization energy than other elements within their periods. The electronegativity of halogens in higher than other elements within their period. O Halogens have larger atomic radii than other elements within their period. O Halogens have less ionizatrion energy than other elements within their periods

Subject: chemistry

How many valence electrons does phosphorus contain? O 10 O 15 O 5 3 2

Which of the following answer choices explains how Lewis-Dot structures are used in Chemistry? O Lewis-Dot Structures are used to illustrate the valence electrons of an atom. Valence electrons are represented as dots around the element symbol of the atom. O Lewis-Dot Structures are used to illustrate the core electrons of an atom. Core electrons are represented as dots around the element symbol of the atom. O Lewis-Dot Structures are used to illustrate the protons of an atom. Protons are represented as dots around the element symbol of the atom. O Lewis-Dot Structures are used to illustrate the neutrons of an isotope. Neutrons are represented as dots around the element symbol of the atom.

3. Give the name of a group 5A ion that is isoelectronic with Kr Give the symbol of a group 5A ion that is isoelectronic with Kr Give the name of the ion with 8 protons and 10 electrons. Spell out the full name of the ion. Give the symbol of the ion with 8 protons and 10 electrons. Express your answer as an ion. Give the name of the ion with 3 protons that is isoelectronic with He. Spell out the full name of the ion.Give the symbol of the ion with 3 protons that is isoelectronic with He. Express your answer as an ion.

Which element is the most electronegative?