Unit 1: Atomic Structure and Properties

/ Unit 1: Atomic Structure and Properties

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You’ll explore how atoms come together to create solids, liquids, and gases, and how forces between particles govern the properties of everything around you.

Question Difficulty:

Question	Difficulty	Students Solved
Solution Dilution Calculation	hard	104
Electrostatic Force Between Protons	hard	25
Photoelectron Spectrum and Element Identification	hard	6
Mass Percentage in a Mixture	hard	8
Mass Spectrum Analysis Simplification	hard	6
Reactivity as a Periodic Trend	hard	8
Photoelectron Spectrum Peak Analysis	hard	2
Mixture Composition From Mass Percent	hard	4
Decomposition of a Carbonate Mixture	hard	2
Redox Titration of a Copper Alloy	hard	2
Mixture Composition by Gravimetric Analysis	hard	1
Alkaline Earth Metal Reactivity Trend	hard	-
Gravimetric Analysis of a Carbonate Mixture	hard	1
Empirical Formula From Combustion Analysis	hard	2
Alloy Composition from Product Mass	hard	-
Electron Configuration From PES Data	hard	1
Photoelectron Spectrum Element Identification	hard	1
Exceptions to the Aufbau Principle	hard	4
Group 15 Ionization Energy Anomaly	hard	1

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Unit Leaderboard

Rank	User	Correct Count	Attempt Count	Time	Score
#1	dldpwn7424	96	100	0m 00s	9,560
#2	misop0709	73	96	0m 05s	7,065
#3	lockdante2	69	106	0m 00s	6,530
#4	yeoneunseol	67	101	0m 00s	6,360
#5	ronthetennisguy	62	71	0m 00s	6,110
#6	itzzhanachan	60	67	0m 00s	5,930
#7	ayemenduh	59	88	0m 00s	5,610
#8	saunialwis	41	60	0m 00s	3,910
#9	selenavuong2009	66	101	41m 52s	3,738
#10	mohamkhan303	40	69	0m 00s	3,710

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