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The element with the atomic number 21 is Scandium. Scandium is the first transition metal and is in Group 3, Period 4 of the Periodic Table. It has 21 electrons in 4 shells with 2 electrons in the outer shell.
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What element has a mass number of 21 and an atomic number of 10?
Sc, scandium (21), the first metal element in the 3d-block (transition elements); next to calcium (20).
Is oygen a element or compound?
Oxygen is an element. it is not a compound.
what element has 21 protons 21 electrons and 24 neutrons?
chromium
What element has 21 neutrons?
An element with 21 neutrons would have an atomic number of 11, as the number of protons in an atom determine its atomic number. Therefore, the element would be sodium (Na), which has an atomic number of 11 and typically has 12 neutrons.
What is the most abundant element in the troposphere?
The most abundant element in the troposphere is nitrogen, making up about 78% of the atmospheric composition. Oxygen is the second most abundant element in the troposphere, making up about 21% of the atmosphere.
What element was named after Scandinavia?
Element number 21, Scandium, was named after Scandinavia.
What does scandium and terbium means?
Scandium is element 21, and terbium is element 65.
How many protons does the element scandium have?
21
The main element element in the atmospheres?
Nitrogen at 78%. Oxygen at 21%. and other gases at 1%
What is SC in the periodic table?
Scandium, element 21
What element has a mass number of 45?
The element with a mass number of 45 is scandium. It has an atomic number of 21, which means it has 21 protons in its nucleus.
What element has a mass number of 21 and an atomic number of 10?
Sc, scandium (21), the first metal element in the 3d-block (transition elements); next to calcium (20).
What element has 24 protons and 21 electrons?
An element's number of protons is the same as its atomic number. Thus, an atom with 21 protons has the atomic number 21. By looking up this element on the periodic table, one finds that it is scandium.
What is element 21 of the periodic table?
Element 21 of the periodic table is scandium (Sc), which is a transition metal. It has an atomic number of 21 and is known for its strong, lightweight properties, making it useful in aerospace and sports equipment industry.
What element has 21 isotopes?
your in bruders chem class lol
How many electrons does the element SC have?
I believe 4s2 is the distinguishing (last) electron
How many protons electrons and nuetrons in Sc-45?
Sc is a 3d element. It has 21 protons and 21 electrons.
