Which three terms could be used to identify the carbon (C) in this chemical equation?

I have a question about isotopes, i understand what they are however i can't answer this question for school. it doesn't seem like i have enough info to answer the question Write the symbols for the following isotopes.

A substance that decreases h + and increases ph when it dissociates in water is called

Atoms of two adjacent elements in the third period are in the ground state. An atom of element A has only s electrons in its valence shell. An atom of element B has at least one p electron in its valence shell. Identify elements A and B.

Which acids have hydro - as part of their name? 1. H2SO3 2. HBr 3. HClO2 4. HF 5. HNO3 (You can choose more than 1)

C.) Is heating of cobalt (ii) chloride crystals a chemical change or a physical change (Imk)

The reaction between elemental phosphorus p4 (s) and o2 (g) to make p4o10 (s) :

What are the divisions within a shell called

Which of the following is a source of water pollution?

The empirical formula for ethane is CH3. The molar mass of propane is 30.08 grams per mole. Determine the molecular formula of ethane.

Liquids take the shape of their