12 Consider the electrically neutral isotopes 45Sc, 46T₁, and 47v. Select all the true statements. Select 2 correct answer(s) A. These isotopes have the same number of neutrons. B. These isotopes have different numbers of protons. C. These isotopes have the same number of electrons. D. These isotopes have the same number of protons and neutrons.

2.     The most common isotope of carbon has a mass of 12. Carbon has an atomic number of 6.A.     How many protons are in an atom of carbon? 17B.     How many neutrons are in an atom of carbon?C.     How many electrons are in an atom of carbon?D.     Another isotope of carbon has a mass of 14. How many protons, neutrons, and electrons are in this isotope?

3. Write the letter of the term that correctly completes the sentence. Elements are different because their atoms contain different numbers of a. electrons b, protons d. nuclei hestal number of protons and neutrons c. neutrons

Which of the following statements is false?a. Atoms of the same element that have different masses are called isotopesb. The masses of isotopes vary because they have a different number ofelectronsc. The mass number of an isotope is the total number of protons and neutronsin the nucleusd. The mass number of an isotope is the total number of protons and neutrons,but without being given the number of electrons.e. Every atom of a particular element has the same number of protons

7. How many neutrons are there in carbon-14 A. 6 B. 8 C. 14 D. 20   8. How many protons are there in an atomic with 8 neutrons and 10 electrons A. 8 B. 10 C. 2 D. 18

4. An atom is electrically neutral because the A. number of protons equals the number of electrons B. number of protons equals the number of neutrons C. ratio of number of neutrons to the number of electrons is 1:1 D. ratio of number of neutrons to the number of protons is 1:1.5 21Illuminate Education TM Inc. DELL F3 F4 F5 F6 F7 F8 F9 F10 SC F1 F2 # $ & 3 7 8 W T Y A S F 1H C Alt E

Which of the following statements is TRUE, and why? A. Anions are usually larger than their corresponding atoms.  B. A neutral atom contains the same number of protons and neutrons. C. Protons and electrons contribute equally to the mass of the atom.

Which statement regarding the nucleus of an atom is correct? O A. The nucleus contains protons and neutrons and has no charge. O B. The nucleus contains protons and electrons and has no charge. O C. The nucleus contains protons and electrons and is positively charged. O D. The nucleus contains protons and neutrons and is positively charged.