Level 1
Name the three subatomic particles found in an atom.
Protons, neutrons, and electrons.
(Oopsie! Your team loses 1 point. Blame the universe.)
What is the name for a positively charged ion?
A positively charged ion is called a cation.
(Double Trouble: +2 if you're right, -2 if you're wrong. No pressure.)
An atom, X has 16 protons and 18 neutrons. Calculate its nucleon number.
Nucleon number = protons + neutrons = 16 + 18 = 34.
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The ion 2412Mg2+ has how many electrons?
Mg atom has 12 electrons. It loses 2 electrons to form Mg²⁺, so electrons = 12 – 2 = 10
(Double Trouble: +4 if correct, -4 if wrong. Drama included.)
In which species are the numbers of protons, neutrons and electrons all different?
A ²⁷₁₃Al
B ³⁵₁₇Cl⁻
C ³²₁₆S²⁻
D ³⁹₁₉K⁺
Answer: D (Big Win! Your team gets +5 points. )
A: p+ = 13, n0 = 14, e-= 13
B: p+ = 17, n0 = 18, e- = 18
C: p+ = 16, n0 = 16, e- = 18
D: p+ = 19, n0 = 20, e- = 18
An atom has an atomic number of 23. What is this atom?
The atom is vanadium (V)
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Where do protons, neutrons and electrons located?
Protons and neutrons are located in the nucleus and electrons are located in electron shells.
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A neutral atom of chlorine has 17 protons and 18 neutrons. Calculate the number of electrons in this atom.
In a neutral atom, electrons = protons = 17.
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The ion 2713Al3+ has how many electrons?
Al atom has 13 electrons. It loses 3 electrons to form Al³⁺, so electrons = 13 – 3 = 10.
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In which pair do the atoms contain the same number of neutrons?
A ¹¹5B and ¹²6C
B ⁷5Li and ⁹4Be
C ²⁴12Mg and ²⁸14Si
D ¹⁴7N and ¹⁶8O
A ( Swap scores with any team. Absolute madness.)
A: ¹¹B has 6 neutrons; ¹²C has 6 neutrons
B: ⁷Li has 4 neutrons; ⁹Be has 5 neutrons
C: ²⁴Mg has 12 neutrons; ²⁸Si has 14 neutrons
D: ¹⁴N has 7 neutrons; ¹⁶O has 8 neutrons
What is the name of the dense centre of an atom?
The nucleus.
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Give an equation to calculate the charge on an ion.
Charge on an ion = number of protons – number of electrons.
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An atom of element Y has a mass number of 52 and an atomic number of 24. Calculate the number of neutrons in this atom.
Neutrons = mass number – atomic number = 52 – 24 =28
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An ion X³⁻ has 18 electrons. Identify(识别) this ion.
P³⁻, charge = protons – electrons 3- = protons - 18
protons = 15.
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Which pairs of species have the same number of electrons?
1. 3517Cl and 3717Cl
2. 3517Cl- and 4018Ar
3.4018Ar and 4019K+
A. 1 and 2 B. 1 and 3 C. 2 and 3 D. 1, 2 and 3
Answer: D (+4 if correct, -4 if wrong. You may ask another team for help, but they get +1 if you're right.)
both Cl atoms have 17 e-.
Cl- has 18 e-, Ar has 18 e-.
Ar has 18 e-, K+ has 18 e-.
What is a nucleon?
A nucleon is a general term for protons and neutrons found inside the nucleus.
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Define isotopes.
Isotopes are atoms that have the same number of protons but different numbers of neutrons
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True or False: An atom of 3517Cl has 17 protons, 18 neutrons, and 17 electrons.
True. Protons = 17, neutrons = 35 – 17 = 18, electrons = 17 (neutral atom).
(ne for Me, Two for You: Your team -1, pick a team to lose 2. )
An ion has 18 electrons and a charge of –2. What is the atomic number of the element?
Atomic number = number of protons = 16.
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Which species has 28 electrons?
A ²⁸₁₄Si
B ⁵⁶₂₆Fe²⁺
C ⁵⁹₂₇Co²⁺
D ⁶⁴₂₉Cu⁺
Answer: D (Chaos Button: Next round, every + and - is ×2. Enjoy the ride.)
A: Si atom: protons = 14, electrons = 14
B: Fe²⁺: protons = 26, electrons = 26 – 2 = 24
C: Co²⁺: protons = 27, electrons = 27 – 2 = 25
D: Cu⁺: protons = 29, electrons = 29 – 1 = 28
An atom has 45 protons. What is this atom?
The atom is rhodium (Rh)
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How do you calculate the mass number of an atom?
Mass number (A) = number of protons + number of neutrons.
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True or False: An atom of 5626Fe has 26 protons，30 electrons and 30 neutrons.
False. A neutral iron atom has 26 electrons, not 30.
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An ion has 17 protons and 18 electrons. Is this ion a cation or an anion?
It is an anion , because electrons > protons.
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Atom X has 12 neutrons and 12 protons.
Which atom is an isotope of X?
A ²⁴₁₂X
B ²⁵₁₂X
C ²⁴₁₃X
D ²⁵₁₃X
Answer: B
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