Charges!
THe CHarge a proton has
Positive
The smallest part of an element that retains its properties
An atom
Atoms of isotopes of an element have different numbers of ______
Neutrons
Of the elements Pt, Sc, V, Li, and Cl, which is a nonmetal
Cl
The lowest energy state of an atom is called the _________.
Ground State
The charge an electron has
Negative
Forms the nucleus of an atom
Protons and Neutrons
The group number, example 2A for Be and Mg can tell us_______.
The Number of Valence Electrons
Chlorine is in Group 7A. What is chlorine’s number of valence electrons?
7
The octet rule states...?
in chemical compounds, atoms tend to have eight electrons in their principal energy level
The charge a neutron has
neutral
The group the following elements found, Li, Na, K, Rb, and Cs
Alkali metals
How the isotopes hydrogen-1 and hydrogen-2 differ
Hydrogen-2 has one neutron, hydrogen-1 has none.
The electron configuration for potassium is 1s^2 2s^2 2p^6 3s^2 3p^6 4s^1. The electron configuration of the most common potassium ion is_________.
1s^2 2s^2 2p^6 3s^2 3p^6
How does calcium obey the octet rule when reacting to form compounds?
It gives up electrons
What is the charge of a carbon atom that contains 6 protons, 8 neutrons, and 6 electrons?
0, its neutral
the number 84 in the name krypton-84 represents
The mass number
The charge of the nucleus of an atom
Positive
The element with an electron configuration of 1s^2 2s^2 2p^3 is in family _________.
5A
Ionic compounds have a high or low melting point?
High
What is the charge of an Iron atom that contains 26 protons, 26 neutrons, and 23 electrons?
+3
All atoms of the same element contain these
The same number of Protons
Depends upon the number of isotopes, the mass of each isotope, and the relative abundance of each isotope of the element
The Atomic Mass
The element has the electron configuration 1s^2 2s^2 2p^6 3s^2 3p^2
Silicon
Explain a covalent bond
A chemical bond that involves the sharing of electron pairs between atoms. These electron pairs are known as shared pairs or bonding pairs, and the stable balance of attractive and repulsive forces between atoms, when they share electrons, is known as covalent bonding.