Which is a process that causes an organism's poorly suited characteristics to disappear?

death rate

adaptation

natural selection

Very reactive nonmetal element has most protons in the halogen group

Consider the compound Pb (SO4) 2 and answer the following questions: What is the name of this compound? What is the molar mass of this compound? Explain how you calculated this value.

Which forces involve nonpolar molecules? hydrogen bonds and London dispersion forces London dispersion forces and dipole-induced dipole forces dipole-dipole forces and hydrogen bonds dipole-induced dipole forces and dipole-dipole forces

What's the general form of double replacement reaction?

In the crystal structure of potassium oxide, the oxide ions are coordinated by eight potassium ions. part a what is the coordination number of potassium? g

How much of a 15.0M stock solution do you need to prepare 250ml of a 2.35ml hf solution?

A synonym for dwindled

A material that cannot be broken down farther by chemical means

How many of the following elements have 2 unpaired electrons in the ground state? C Te Hf Si A) 1. B) 2. C) 3. D) 4.

Which has a higher frequency, a neutron or electron? Why?