This element has 1 proton, 1 neutron, and 1 electron.
What is Hydrogen?
The energy required to remove an electron from an atom is the atom's......
What is ionization energy
This is the number of protons and neutrons added together.
What is Mass number
A measure of the ability of an atom in a chemical compound to attract electrons from another atom I the compound is called......
What is electronegativity
Argon, Krypton, and xenon are......
What are noble gases
How many protons are in Carbon?
6
When an electron is acquired by a neutral atom, the energy change is called.....
What is electron affinity
Elements in groups 3 and 4 have the properties of.....
What are metals
Elements in a group or column in the periodic table can be expected to have similar......
Properties
How many protons, neutrons, and electrons are in the following negative one charged element?
45Sc
21
P - 21
N - 24
E - 22
One-half the distance between the nuclei of identical atoms that are bonded together is called the.....
What is atomic radius
A group of man-made elements
What is Actinide Series?
Atoms in the same group have similar properties because...
They have the same number of valence electrons
What is the atomic mass of hafnium if, out of every 100 atoms, 5 have a mass of 176, 19 have a mass of 177, 27 have a mass of 178, 14 have a mass of 179, and 35 have a mass of 180.0?
178.55 amu
Why do atoms shrink as you move left to right on the periodic table?
There is greater attraction between the nucleus and the electron shell because of the addition of protons to the nucleus and electrons to the same shell level
Compared to the alkali metals, the alkaline earth metals are..... a)are less reactive b)have lower melting points c)are less dense d)combine more readily with nonmetals
What is a) less reactive
The most reactive group of the nonmetals is the...
List the 3 known properties of these elements.
What is halogens
nonmetals, extremely reactive, 7 valence electrons