Isotopes are atoms of the same element with the same number of protons and a different number of

a. electrons.

b. molecules.

c. neutrons.

d. ions. reset selection

Which sub-atomic particle is positively charged and found in the nucleus? a. proton b. neutron c. electron d. beta particle

Which criteria determine whether a heterogeneous mixture is a colloid or a suspension?

How does energy change when you consume nutrients?

Which of the following elements listed is the least metallic

An atom requires 6.24 * 10-19J to remove its furthest electron in the gas phase. What is the maximum wavelength of electromagnetic radiation that will result in ionization? Report your numerical answer in units of nm. Use significant figures.

Calculate the moles of new H₂ O₂ using the balanced formula below and the average moles of KMnO₄ from calculation #2. The average moles of KMnO₄ is 0.90mol. 2KMnO₄ + 5H₂O₂ + 3H₂SO₄ → K₂SO₄ + 2MnSO₄ + 8H₂O + 5O₂ Edit: I got 2.

How many grams of CaC2 would make 23.6g C2H2?

Shane performed the following trials in an experiment. Trial 1: Heat 30.0 grams of water at 0 °C to a final temperature of 40.0 °C. Trial 2: Heat 40.0 grams of water at 10.0 °C to a final temperature of 40.0 °C.

According to the law of conservation of ___ in an isolated system the initial total momentum before a collision equals the final total momentum.

What is the correct name fore this formula Al2O3