Isotopes have _____ a. the same number of protons but different numbers of elect
ID: 539283 • Letter: I
Question
Isotopes have _____ a. the same number of protons but different numbers of electrons. b. the same number of neutrons but a different number of protons. c. the same total number of protons and neutrons. d. the same number of protons but a different number of neutrons. e. the same atomic mass. Identify the element based on the following values for its three isotopes: 38.9637 amu (93.08%), 39.9640 amu (0.012%), and 40.9618 amu (6.91%). a. Cl b. Ar c. S d. K e. Ca Which of the following statements regarding ionization energy is NOT true? a. The ionization energy increases as Z_eff increases. b. Ionization energy is the energy required to remove a mole of electrons from a mole of gas-phase atoms or ions. c. Anomalies in ionization energy trends can occur due to electron pairing in orbitals. d. Ionization energies are always positive because it takes energy to pull the negative electron away from the positive nucleus. e. Atoms in the same column of the periodic table have equal ionization energies.Explanation / Answer
15. d Isotopes are atoms with the same number of protons but that have a different number of neutrons.
The atomic number is equal to the number of protons and the atomic mass is the sum of protons and neutrons, we can also say that isotopes are elements with the same atomic number but different mass numbers.
16. d K
AW=38.96377(0.9308) + 39.9640(0.00012)+40.9618(0.0691)=39.102668=39.10amu=K
17.e Atoms in the same column of the periodic table have equal ionization energy .
It Decreases as we move down a column
Atomic radius and electron shielding both increase on moving down a column and hence ther energy required to extract an electron decreases.
Related Questions
drjack9650@gmail.com
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.