Valence Electrons
How many valence electrons do Alkali Metals have?
1 valence electron
Positively charged ions are called?
Cations
Cl-35 and Cl-37 are two isotopes of Cl, what differences make them isotopes?
Different number of neutrons and different mass #
How many protons, neutrons and electrons does 14N have?
7 protons, 7 neutrons and 7 electrons
This element is a noble gas on energy level 2, what is the element's name and symbol?
Neon --> Ne
What Noble Gas is Oxygen trying to mimic and how many valence electrons does it have?
Neon --> 6 valence electrons
What would be the charge of an O ion?
O2-
B-11 and B-13 are both isotopes of Boron, which isotope is more abundant?
B-11 --> PT mass # is 11 amu
How many protons, neutrons and electrons does 52Cr have? What is its charge?
24 protons, 28 neutrons and 24 electrons.
Neutral charge
What is the identity of the element on period 5, Group 7A. Is it a metal, metalloid or nonmetal?
Iodine --> nonmetal
Neon --> 3 valence electrons
How many protons, neutrons and electrons does Ba ion (Barium) have? And what is its charge?
56 protons, 81 neutrons, 54 electrons and 2+ charge
What is the number of protons, neutrons and electrons and charge of the I-131?
53 protons, 78 neutrons, 53 electrons and neutral charge
60 Cu2+ has how many protons, neutrons and electrons?
29 protons, 31 neutrons, 27 electrons
What metalloid is on period 5?
Sb or Te
How many valence electrons does group 8A have?
0 valence electrons
The element on Group 1A, energy level 3 have __ electrons when it becomes an ion. What is the identity and charge of this ion.
10 electrons --> Na+
What is the number of protons, neutrons and electrons for the isotope Al-30?
13 protons, 17 neutrons and 13 electrons
A substance has 18 electrons, 15 protons and 18 neutrons is it an atom or ion? State symbol and charge if ion.
ion --> P3-
Elements on the same ___ have similar chemical properties and reactivities.
Group
How many valence electrons does Group 4A have and what type of element only applies to this rule?
4 valence electrons --> metals
The element on Group 6A, energy level 4 has ___e- when it becomes an ion. What is the symbol and charge of the ion?
36 electrons --> Se2-
An isotope has 8 protons, 10 neutrons and 8 electrons. What is the symbol and isotope mass of this element?
A substance has 49 protons, 66 neutrons and 46 electrons, what is the identity and charge of this element?
In3+
What is the symbol for a Group 4A metal?
Sn --> Tin
Pb --> lead