Atomic Theory
This scientist’s model included orbitals and quantized energy levels.
Who is Niels Bohr?
A bond between two nonmetals that share electrons unequally
What is a polar covalent bond?
How many atoms are in 1.00 mol of oxygen gas (O₂)?
What is 1.204 × 10²⁴ atoms?
This must be conserved when balancing chemical equations.
What is mass?
This type of reaction absorbs energy from the surroundings.
What is an endothermic reaction?
What does the number of protons in an atom determine?
What is the element’s identity
Which element has the highest electronegativity?
What is fluorine?
This is the mass of 1 mol of H₂O in grams.
What is 18.02 g/mol?
What does a net ionic equation exclude?
What are spectator ions?
This type of reaction releases energy, usually in the form of heat or light.
What is an exothermic reaction?
An isotope differs from another of the same element by this.
What is the number of neutrons
The VSEPR theory helps predict this about molecules.
What is the molecular shape or geometry?
In the equation 2H2+O2→2H2O2H_2 + O_2 → 2H_2O2H2+O2→2H2O, how many moles of water are produced from 3 moles of oxygen?
What is 6 moles of water?
The total ionic equation for: Na2SO4(aq)+BaCl2(aq)→BaSO4(s)+2NaCl(aq)Na_2SO_4 (aq) + BaCl_2 (aq) \rightarrow BaSO_4 (s) + 2NaCl (aq)Na2SO4(aq)+BaCl2(aq)→BaSO4(s)+2NaCl(aq).
What is: 2Na⁺ + SO₄²⁻ + Ba²⁺ + 2Cl⁻ → BaSO₄(s) + 2Na⁺ + 2Cl⁻
In an endothermic reaction, the temperature of the surroundings will do this.
What is decrease?
These orbitals fill in the order 1s, 2s, 2p, 3s, 3p, 4s…
What are atomic orbitals, in order of increasing energy
What is the shape of a molecule with 4 bonding pairs and no lone pairs?
What is tetrahedral?
This is the limiting reagent if 2.0 mol of A reacts with 3.0 mol of B, and the reaction is A + 2B → C.
What is B?
In a precipitation reaction, this forms when two aqueous solutions mix.
What is a precipitate?
The decomposition of baking soda when heated is an example of this type of reaction.
What is an endothermic reaction?
This principle states electrons occupy the lowest energy orbital available.
What is the Aufbau Principle?
This term describes the mixing of atomic orbitals to form new, identical hybrid orbitals.
What is hybridization?
How many grams of NaCl are required to prepare 250 mL of a 0.50 mol/L solution?
What is 7.3 g NaCl?
This type of reaction involves the transfer of electrons.
What is a redox reaction?
In a potential energy diagram, this reaction has products with lower energy than the reactants.
What is an exothermic reaction?