The interactions within the molecule are called? a. intramolecular forces, b. hydrogen bonding, c. intermolecular forces, or d. dispersion forces?

17, A compound is a substance composed of two or more elements that are (1) chemically combined in a fixed proportion (2) chemically combined in a variable proportion (3) physically mixed in a variable proportion ((4) physically mixed in a fixed

What is the difference between the number of electrons in an atom of selenium?

Write equation for the first ionization energy of neon. express your answer as a chemical equation. identify all of the phases in your answer.

Unlike toads, tortoises A. have jaws and paired appendages. B. have amniotic eggs. C. have true bone. D. have lungs.

What is the element produced when 44ti undergoes electron capture?

How many periods does the periodic table have? 7 18 9 8

Which one is correct A. It allowed them to escape B. It allowed them to chase down C. It allowed them to reach food D. All of these

A 20.0 mL sample of hydrochloric acid was neutralized with 58.4 mL of 0.250 M NaOH, in a titration. a. Write the balanced chemical equation for the reaction, b. What is the concentration of the hydrochloric acid?

Magnesium and calcium have similar chemical properties because a magnesium atom and a calcium atom have the same (1) atomic number (2) mass number (3) total number of electron shells (4) total number of valence electrons

Which properties change the composition of a substance? Physical properties Neither chemical nor physical properties Chermical and physical properties Chemical properties