Which of these statements is incorrect regarding an atom of the element scandium?

A. Its chemical symbol is Sc.
B. It has 21 positively charged protons in its nucleus.
C. It has 21 neutrons in its nucleus.
D. It has 21 negatively charged electrons.

Scandium is a metal that is silvery in color. When exposed to air, it tends to tarnish. It burns quite easily and will react with water. Scandium was discovered by Lars Fredrik Nilson in the year 1879 in the country of Sweden and its name is from the Latin word Scandia, meaning Scandinavian.

Other properties of Scandium include:

Melting point: 1539.0 °C

Boiling point: 2832.0 °C

Density: 2.989 grams/cm³

Normal phase: Solid

Family: Transition metals

Period: 4

Which of these statements is incorrect regarding an atom of the element scandium? A. Its chemical symbol is Sc. B. It has 21 positively charged protons in its nucleus. C. It has 21 neutrons in its nucleus. D. It has 21 negatively charged electrons.

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Which of these statements is incorrect regarding an atom of the element scandium?

A. Its chemical symbol is Sc.
B. It has 21 positively charged protons in its nucleus.
C. It has 21 neutrons in its nucleus.
D. It has 21 negatively charged electrons.