Chapter 2: The Periodic Table

chemical reaction

chemical reaction

For an ion of an element, the number of electrons will change because after a(n) ________, the atom has either lost or gained electrons.

valence electrons

With cations, it's easy to identify the hcnag ein sixse size by losing its ________, an atom loses its entire outer shell, thus making it smaller.

noble gasses

The ________ are gaseous at room temperature and the remaining elements are solids.

Electronegativity

________ shows the same diagonal trend as ionization energy and electron affinity.

Radioactive decay

________ can also result in energy, released in the form of x- rays or gamma rays.Periodic Properties and Trends.

Atoms

________ and molecules will undergo chemical reactions to gain or lose electrons such that they have a full valence shell and are isoelectronic with a noble gas.

Cations

________ are smaller than the neutral atom of the same element, while anions are always larger than the neutral atoms.

non metals

The melting and boiling points of metals tend to decrease from the top to the bottom of a group, bu ________ show an increase in their melting and boiling points.

Metalloids

________- Elements bordering the line between metals and non- metals are often termed metalloids since they exhibit properties of both metals and nonmetals.

Electron

DIfferentiating ________- A differentiating ________ is the ________ in a neutral element that makes it different from the previous element.

Neutrons

________- The neutron is another subatomic particle present within the nucleus of the atom.

positive ion

A(n) ________ has lost electrons and a negative ion has gained electrons.

Valence electrons

________ have lower ionization energy when compared to the notation of energies of the same atoms core electrons.

Chemical reactions

________ occur when atoms collide with one another and since in these collisions, the outermost electrons make the first contact, elements with similar electronic structures have similar chemical properties.