Atomic History
He created the first periodic table by arranging elements by increasing atomic mass and predicting unknown elements.
Who is Mendeleev?
These two subatomic particles are located inside the nucleus.
What are protons and neutrons?
This periodic family has an electron configuration ending in s1 and an oxidation number of +1.
What are the Alkali Metals?
This type of bond involves the transfer of electrons.
What is an Ionic bond?
This is the correct formula for Calcium Carbonate.
What is CaCO3?
This scientist perfected the periodic table by arranging elements by increasing atomic number.
Who is Henry Moseley?
As the atomic number increases, the number of this specific particle in the nucleus must also increase.
What is a proton?
Of the elements Mg, S, Al, and Cl, this one has the largest atomic radius
What is Mg (Magnesium)? (Radius decreases left to right)
This type of bond is formed between nonmetals sharing electrons.
What is a Covalent bond?
This unit is the smallest part of a covalent compound (as opposed to a formula unit for ionic).
What is a molecule?
In the Gold Foil Experiment, most alpha particles went straight through, proving the atom is mostly this.
What is empty space?
Isotopes of the same element have the same number of protons but a different number of these.
What are neutrons?
Of the elements Cl, Na, Si, and F, this one has the highest electronegativity
What is F (Fluorine)?
This is the correct chemical formula for Dinitrogen Pentafluoride.
What is N2F5?
To find the number of grams in 0.25 moles of H2SO4, you must multiply 0.25 by this value.
What is the Molar Mass of H2SO4?
J.J. Thomson’s cathode rays were attracted to a positive plate, leading to the discovery of this negatively charged subatomic particle.
What is the electron?
This is the element with the electron configuration 1s2 2s2 2p6 3s2 3p3.
What is Phosphorus (P)
This periodic trend increases as you move up a group and to the right across a period.
What is Electronegativity?
What is Ionization Energy?
In a Lewis dot structure for CH4, carbon is the central atom surrounded by this many single bonds.
What is 4?
This is the percent of oxygen (by mass) in the compound NaHSO4
What is ~53.3%?
While Rutherford discovered the nucleus, this scientist improved the model by placing electrons into specific energy levels or orbitals.
Who is Niels Bohr?
This is the number of valence electrons found in the element with the configuration [He] 2s2 2p6
What is 8?
This is the electron configuration ending for the Halogen family (Group 17)
What is s2 p5?
Substances with this type of bonding generally have the highest melting points and form crystal lattices.
What is Ionic bonding?
If a student needs to quantify 2 moles of CO2, this is the calculation they must perform to find the mass in grams.
What is multiply 2 moles by the molar mass of CO2 (44.01 g/mol)?