1.) How many periods are on the periodic table? Are periods the columns or the rows on the periodic table?

The wavelength of a light wave whose frequency 5.0x 10^9 s^-1 is

Why isn't a comet a planet?

During the flood recovery process, you should empty all containers that contain contaminated water and clean them with dilute chlorine bleach. A) TrueB) False

You may have heard about quarks and quark theory. Quarks are elementary particles that make up larger particles, called hadrons. Protons and neutrons are two examples of hadrons. Research quark theory and how quarks might fit into our atomic model.

What's an alloy and give five examples and their uses in our daily lives

How many grams of sodium ions are in na2so4?

Electron configuration for iron?

Explain how melting is considered endothermic

In the process of covalent bonding, atoms share electrons. This means that * a) Electrons from each atom are attracted to the nucleus of both atoms b) Protons and neutrons attract c) Atoms lose electrons and become ions d) Atoms gain electrons and

Give the full atomic symbol for an atom that has 30 neutrons and an atomic number of 25