Represente, usando a notação de Lewis, a ligação e o composto formado pela união do cálcio (Z=20) e do cloro (Z=17).

Covalent compounds: mastery test select the correct answer what is formed when atoms join together with a covalent bond? a. an ion b. a molecule c. a neutral atom d. a noble gas

When did stem cell research become known ? who discovered stem cell? what experiments or studies have been conducted so far?

What is bromine+calcium iodide--> calcium bromide +iodine balanced