What subatomic particle does the atomic number identify?

Using bridge notation convert 463kg to mg

Identify the elements in the second, third, fourth, and fifth periods that have the same number of highest-energy-level electrons as barium.

What do you need to know describe the velocity of an object

Which are characteristic of eukaryotic organisms? Select three options

A scientist to study in a sample of an unknown substance do scientist determine's with the substance is a metalloid with four valence electrons. Which two elements could the unknown be

What are the basic building blocks of matter? A) molecules B) atoms C) electrons D) compounds

How does an atom with too few neutrons relative to protons undergo radioactive decay? * by converting proton to a neutron by converting a neutron to a proton by emitting an alpha particle

What is the chemical formula for the compound formed between sodium and iodine?

8. Write a balanced chemical equation showing how you could prepare each of the following salts from an acid-base reaction: KNO3, NaBr, and Cas.

Is calcium carbonate a compound element or mixture?