Trends
Does electronegativity get higher or lower as you go from left to right the periodic table?
higher
Who organized the periodic table?
Mendeleev
What is the atomic number for aluminum?
13
Which of the following occurs in an ionic bond?
a)two atoms share two electrons
b)two atoms share more than 2 electrons
c)oppositely charged ions attract
d)like-charged ions attract
C) oppositely charged ions attract
What type of intermolecular force is present in a sample of CO2
London Dispersion Force
What is the element with the lowest electronegativity value?
Calcium
Cesium
Fluorine
Oxygen
Cesium
Who discovered protons?
Earnest Rutherford
A chlorine atoms has atomic number 17, is electrically neutral, and mass number 35. How many protons, neutrons, and electrons does chlorine have?
17 Protons
17 electrons
18 neutrons
Magnesium bromide is an ionic compound with the chemical formula MgBr2 what does the "2" represent?
There are two bromide ions for every magnesium ion
What is the shape of ammonia, NH3?
Trigonal Pyramidal
How many valence electrons does carbon have?
4
Who discovered the neutrons?
James Chadwick
Isotopes of an element contain different numbers of....?
Neutrons
Why do atoms share electrons?
To attain a noble-gas configuration. Complete the octet rule.
What are the 7 diatomic molecules?
I2, Br2, Cl2, F2, O2, N2, H2
Elements on the Periodic Table are arranged by...?
Atomic Numbers
Who discovered the electrons?
J.J Tomson
How many electrons are in
11B3-
8
What is the formula unit of aluminum oxide?
Al2O3
What is the molecular shape of H2O
Bent
Elements in a group or column in the periodic table can be expected to have similar.....?
Properties
Who was the first person to name the atom?
Democritus
In becomes excited
What is the formula unit for dinitrogen pentoxide
N2O5
What is the name for KNO3?
Potassium Nitrate