Which particles that make up an atom are involved in nuclear reactions?

protons only

protons and neutrons

electrons only

electrons and neutrons

RES

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What trend do you observe in electronegativity on the periodic table? -increases from left to right - increases from top to bottom - increases in all directions out from the element Fluorine

The metals occur together in the periodic table. How are they organized? a. on the left side b. on the right side c. the far right column d. the second and third rows

Which two gases can not be broken down by chemical means

Which of these substances contains the most total atoms per molecule? A) Na2PFO3 B) H2SO4 C) Ni (NO3) 2 D) NbCl5

Identify the precipitate in this reaction: calcium nitrate reacts with sodium phosphate.

Water has a large K, value. True False

What mass of CO2 will sublimate given 500 kJ of energy at room temperature? (ΔHsub=26.1kJmole)

A sample of helium, at 20 °c, occupies a volume of 3.17 l at a pressure of 6.21 atm. what volume does this helium sample occupy if the pressure is reduced to 5.57 atm while maintaining the temperature at 20 °c?

List the different kinds of nitrogen bases

What is the purpose of the scientific method? A. To make a guess in order to prove a hypothesis B. To provide a reliable answer to a specific question C. To remove any source of bias in an experiment D.