The density of a sample of metal is calculated using these three different sets of data: 2.9 g/ml, 2.8 g/ml, and 3.0 g/ml. if the true density of the metal is 2.1 g/ml, what can be said about these calculated density values?

They are precise but not accurate.

Precision refers to how close your measurements are to each other. Your calculated densities are all within 0.1 g/mL of the average value (2.9 g/mL).

Accuracy refers to how close your measurements are to the known value. Your average density is far from the known value (almost a 40 % error).

i dont know

explanation:

1. a)c-14 has two more protons

2. d)they have different numbers of protons, neutrons, and valence electrons; they are all gases at room temperature.

3. c) iron and nickel.