A monatomic ion with a charge of 2 has an electronic configuration of 1s22s22p6. This ion is a(n) . What is the chemical symbol of the noble gas this ion is isoelectronic with

What is the ph of a solution with a 1.50 × 10−9 m hydroxide ion concentration?

An electron moved from shell n = 2 to shell n = 1. what most likely happened during the transition? a fraction of a photon was added. a photon of energy was absorbed. a fraction of a photon was removed. a photon of energy was released.

This chart lists four kinds of polymers and their sources. what can be known about all four polymers, despite their differences? they come from living things. they share ionic carbon bonds. they are at least 100 monomers long. they are made of repeating subunits.