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 negatively charged electrons.
d. it has 21 neutrons in its nucleus.

What is limiting reactant? with examples

Some animals that try to adapt to climate changes eventually die due to starvation, as climate change alters the web.

Gusing the milligrams of ascorbic acid you entered above, the ratio of total sample volume to aliquot volume, and the total milligrams of the vitamin c tablet that you dissolved, calculate the mass of ascorbic acid in the vitamin c tablet for each trial. do this by scaling up to find the amount (mg) of ascorbic acid in your 250 ml flask. enter your calculated mass of ascorbic acid in the vitamin c tablet, for each trial. be sure to enter your calculated mass in the corresponding order that you entered your milligrams of ascorbic acid. the milligrams of ascorbic acid you entered for entry #1 previously should correspond to the mass of ascorbic acid that you enter for entry #1 here.