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Quizzes > Science

21-30 elements: symbols and names quiz

Quick, free atomic numbers 21-30 quiz with instant feedback.

Editorial: Review CompletedCreated By: Rijoe MathewUpdated Aug 28, 2025
Difficulty: Moderate
2-5mins
Learning OutcomesCheat Sheet
Paper art illustration for a quiz about elements 21-30 on a coral background

This quiz helps you master the element symbols and names for elements 21 to 30, from Scandium to Zinc. If you want a warm-up first, try our first 20 elements quiz or broaden your practice with the first 36 elements quiz. You can also drill symbol matching anytime with the element symbols quiz, then come back to check your score here.

What is the chemical symbol for Scandium?
Sc
Sa
Sd
Sn
Scandium is assigned atomic number 21 and its symbol is Sc, which is derived from the first two letters of its name. It was discovered by Lars Nilson in 1879 and is classified as a transition metal. Scandium is relatively rare in the Earth's crust. Learn more at .
Which element has atomic number 22?
Chromium
Scandium
Vanadium
Titanium
Titanium is the element with atomic number 22 and is a lustrous transition metal known for its high strength-to-weight ratio. It is often used in aerospace applications and medical implants. Titanium's symbol Ti reflects its name derived from the Titans of Greek mythology. More details at .
What is the chemical symbol for Vanadium?
Va
V
Ve
Vm
Vanadium has atomic number 23 and its chemical symbol is V. It was named after Vanadis, another name for the Norse goddess Freyja. Vanadium is used as an alloying agent in steel to improve strength and corrosion resistance. Read more at .
Which element has the symbol Cr?
Carbon
Copper
Chromium
Calcium
Chromium, with atomic number 24, uses the symbol Cr. It is known for its high corrosion resistance and is a major component of stainless steel. Chromium gives rubies their red color when present as trace impurities. More information at .
What is the chemical symbol for Iron?
Ia
In
Ir
Fe
Iron is represented by the symbol Fe, derived from its Latin name ferrum, and has atomic number 26. It is the most abundant element on Earth by mass and essential for hemoglobin in blood. Steel, an alloy of iron, is one of the most important engineering materials. Learn more at .
Which element has atomic number 27?
Cobalt
Nickel
Copper
Manganese
Cobalt carries the atomic number 27 and is represented by the symbol Co. It is a hard, lustrous metal used in high-strength alloys and rechargeable batteries. Cobalt-60, an isotope, is employed in medical radiotherapy. More at .
What is the chemical symbol for Copper?
Co
Cu
Cb
Cp
Copper's symbol is Cu, from its Latin name cuprum, and it has atomic number 29. It is highly conductive and widely used in electrical wiring and plumbing. Copper also develops a characteristic green patina (verdigris) over time. Details at .
Which element has the symbol Zn?
Zirconium
Zinc
Zassium
Xenon
Zinc, atomic number 30, uses the symbol Zn. It is commonly applied for galvanizing steel to protect against corrosion. Zinc is also an essential trace element in biology. Learn more at .
Among elements with atomic numbers 21 to 30, which has the highest atomic mass?
Zinc
Nickel
Iron
Copper
Zinc has the highest atomic mass (~65.38 u) among elements 21 - 30. Copper follows at about 63.55 u. Atomic mass generally increases with atomic number, but isotopic composition also plays a role. See .
Which of these elements is ferromagnetic at room temperature?
Vanadium
Cobalt
Manganese
Titanium
Cobalt is one of only three ferromagnetic elements at room temperature (the others being iron and nickel). Titanium and vanadium are paramagnetic, while manganese has complex antiferromagnetic behavior. More at .
Which element's oxide layer provides corrosion resistance in stainless steel?
Iron
Nickel
Manganese
Chromium
Chromium forms a thin, adherent oxide layer (Cr2O3) that protects stainless steel from corrosion. Stainless steel alloys typically contain at least 10.5% chromium to maintain this passive film. Iron oxide, by contrast, flakes off and exposes fresh metal. See .
Which element serves as the primary catalyst in the Haber ammonia synthesis process?
Vanadium
Cobalt
Nickel
Iron
Iron is the standard industrial catalyst for the Haber - Bosch process, often promoted with promoters such as potassium and aluminum oxides. It facilitates N2 dissociation to produce ammonia under high pressure and temperature. More at .
Which element from this group is most commonly used in lithium-ion battery cathodes?
Iron
Cobalt
Zinc
Copper
Lithium cobalt oxide (LiCoO2) cathodes in many lithium-ion batteries rely on cobalt for high energy density. Alternative chemistries use nickel or manganese, but cobalt remains prevalent. For more, see .
Manganese dioxide is primarily used in which type of battery?
Lithium-ion batteries
Alkaline batteries
Lead-acid batteries
Nickel-cadmium batteries
Manganese dioxide (MnO2) is used as the cathode material in alkaline batteries and zinc - carbon cells. It acts as an oxidizing agent during discharge. Lead - acid and NiCd cells use different chemistries. See .
Which element is commonly used for galvanizing steel to prevent corrosion?
Chromium
Calcium
Zinc
Magnesium
Galvanizing coats steel with a layer of zinc, which sacrificially corrodes to protect the underlying metal. Zinc's reactivity ensures it corrodes preferentially to iron. This process greatly extends the life of steel structures. More at .
Which trace element is essential for human enzyme function and immune response?
Zinc
Copper
Iron
Vanadium
Zinc is a critical cofactor for over 300 enzymes and is vital for immune system function, DNA synthesis, and cell division. Deficiency can lead to impaired growth and immune dysfunction. Human bodies tightly regulate zinc levels. See .
Which element has the electron configuration [Ar] 3d5 4s2?
Chromium
Cobalt
Manganese
Iron
Manganese has the configuration [Ar] 3d5 4s2, reflecting its half?filled d?subshell properties. Chrominum is an exception with [Ar] 3d5 4s1, while iron is [Ar] 3d6 4s2. Electronic configuration influences oxidation states and chemistry. More on .
The organometallic compound ferrocene consists of which element at its center?
Iron
Cobalt
Chromium
Nickel
Ferrocene has the sandwich structure with an iron atom between two cyclopentadienyl rings. Discovered in 1951, it opened the field of metallocene chemistry. The Fe center experiences a +2 oxidation state in this complex. Read more at .
In which oxidation state does chromium commonly exist in chromate compounds?
+3
+6
+4
+2
Chromate (CrO4^2?) and dichromate (Cr2O7^2?) ions feature chromium in the +6 state, giving them strong oxidizing properties and their yellow to orange colors. Chromium(III) compounds are more stable and less toxic. For details see .
Which isotope of cobalt is widely used in radiotherapy and industrial gamma radiography?
Cobalt-58
Cobalt-57
Cobalt-60
Cobalt-59
Cobalt-60 emits high?energy gamma rays and is used in cancer radiotherapy and industrial inspection. It has a half?life of about 5.27 years. Cobalt-59 is the only stable isotope of cobalt. More at .
Exposure of copper to moisture and oxygen often results in the formation of which compound on its surface?
Copper oxide
Copper carbonate patina
Copper sulfate
Copper nitrate
The green patina on aged copper is primarily basic copper carbonate (Cu2CO3(OH)2), formed over time by reaction with carbon dioxide and moisture. This layer protects the underlying metal from further corrosion. It's commonly seen on statues and roofs. See .
Zinc oxide exhibits amphoteric behavior. What does this mean?
It reacts with both acids and bases
It does not react with acids or bases
It reacts only with acids
It reacts only with bases
Amphoteric substances like zinc oxide can react with both acids (forming salts and water) and bases (forming complex zincates). This dual behavior is rare for metal oxides. Zinc oxide's amphoterism is exploited in ceramics and skincare. More at .
Which element has the highest first ionization energy among atomic numbers 21 - 30?
Zinc
Copper
Chromium
Nickel
Zinc has the highest first ionization energy (~906 kJ/mol) among elements 21 - 30, due to its filled 3d10 4s2 configuration. Copper and nickel follow, but zinc's filled d?subshell provides extra stability. Data from .
Which element in this series exhibits an anomalous electron configuration of [Ar] 3d5 4s1 rather than following the expected Aufbau order?
Manganese
Vanadium
Titanium
Chromium
Chromium's ground?state configuration is [Ar] 3d5 4s1, which maximizes half?filled d?orbital stability. The expected Aufbau configuration would be [Ar] 3d4 4s2, but electron exchange energy stabilizes the observed form. See .
Mössbauer spectroscopy commonly utilizes which isotope of iron from this series?
Iron-56
Iron-58
Iron-57
Iron-54
57Fe is Mössbauer?active and widely used for high?resolution studies of iron compounds and alloys. Its nuclear transition at 14.4 keV provides precise insights into oxidation state and electronic environment. Other isotopes are not Mössbauer?active. Details at .
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Study Outcomes

  1. Identify Chemical Symbols -

    Readers will be able to identify the official chemical symbols of elements 21 through 30, reinforcing their grasp of the periodic table's mid-range elements.

  2. Recall Element Names -

    Readers will be able to recall and accurately name Scandium through Zinc, solidifying their knowledge of the first 30 elements quiz content.

  3. Match Symbols to Names -

    Readers will match each element symbol with its corresponding name in an interactive format, enhancing symbol-name association skills.

  4. Recognize the Shortest Element Name -

    Readers will identify the chemical element with the shortest name among elements 21-30, deepening attention to naming conventions.

  5. Compare Element Patterns -

    Readers will compare atomic numbers, symbols, and naming patterns across elements 21-30 to uncover trends within the mid-range periodic table.

  6. Apply Knowledge to Broader Sets -

    Readers will apply their understanding of elements 21-30 to quizzes covering elements 1-30, boosting overall periodic table proficiency.

Cheat Sheet

  1. Symbols & Atomic Numbers (21 - 30) -

    Memorize the chemical symbols Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn alongside their atomic numbers 21 to 30. Use the mnemonic "Scary Tiger Viciously Charges, Monkeys Flee, Cows Nap, Cuddly Zebras Zoom" to lock in each element's place on the periodic table (IUPAC).

  2. Electron Configuration Patterns -

    Elements 21 - 30 fill the 3d subshell after 4s, producing configurations like Sc [Ar] 4s2 3d1 up to Zn [Ar] 4s2 3d10. Practice writing each to see how the Aufbau principle leads to exceptions like Cr and Cu (e.g., Cr is [Ar] 4s1 3d5).

  3. Oxidation States & Colors -

    Review common oxidation states: V ranges from +2 to +5, Mn from +2 to +7, and Fe typically +2/+3. Refer to university spectra data showing Mn2+ (pale pink) and Cr3+ (green) to connect oxidation state with compound color (source: Royal Society of Chemistry).

  4. Periodic Trends (Atomic Radius & Ionization Energy) -

    Across elements 21 - 30, atomic radius decreases and ionization energy generally increases due to higher nuclear charge. Comparing values (e.g., Sc 162 pm vs. Zn 139 pm radius) from NIST tables cements understanding of periodic trends.

  5. Shortest Element Names -

    Among the first 30 elements, Iron and Zinc each have the shortest English names (4 letters). Use this trivia as a fun anchor for your first 30 elements quiz and to reinforce recall of Fe (26) and Zn (30).

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