Which of the answer choices accurately describes a trend that occurs when moving left to right across periods?

(Select all that apply.)

reactivity increases

atomic radius increases

atomic mass increases

valence electrons decrease

Elements for NaC1 (5)

Which is an example of pure chemistry

What is the cause of farsightedness? The cornea is irregular. The cornea is opaque. The eyeball is shortened. The eyeball is elongated.

What does Earth's hydrosphere include? the water on Earth the hard outer part of Earth the layer of gases surrounding Earth the living things on Earth

Question a chemist mixes 35 milliliters of a solution that is 18% acid with 90 milliliters of a solution that is 68% acid. answer the questions below. do not do any rounding.

What is the difference between a root word and a combining form? List 2 examples of combining form

What is the octet rule and how does it explain the formation of ionic compounds?

Can somebody explain step by step how to solve decomposition reactions?

Which of the following statements are correct about the chemical reaction? H2 + O2 - > H2O2 versus 2 H2 + O2 - > 2 H2O? They are both balanced chemical equations. The two reactions are equivalent. The laws of thermodynamics apply to both.

What do chemists use to describe a chemical reaction