Chemistry Chapter 2 Quiz

False (B)

P: Neutrons, Q: Protons, R: Electrons

<p>Nucleus</p> Signup and view all the answers

<p>Proton = Positive charge Neutron = No charge Electron = Negative charge</p> Signup and view all the answers

<p>Sodium (C)</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

<p>2.5</p> Signup and view all the answers

<p>-269</p> Signup and view all the answers

<p>Helium = -269 °C Neon = -246 °C Argon = -186 °C Krypton = -153 °C</p> Signup and view all the answers

Atoms are made up of protons, neutrons, and electrons.

The central part of an atom, containing protons and neutrons.

The total number of protons and neutrons in an atom's nucleus.

To identify an element, use atomic mass (sum of Protons + neutrons).

Element with atomic number 6 (6 protons).

An element in the third row of the periodic table that has metallic properties.

Elements in the last column of the periodic table, characterized by unreactivity.

The relationship between the mass of an atom and the point at which a liquid turns into a gas (boiling).

These elements are unreactive due to their filled outermost electron shells (valence electrons)

Halogens' reactivity decreases down the group as atoms get bigger, reducing attraction with electrons.