Download Chapter 4 Study Guide Section 4.1 What was Dalton`s Atomic

Chapter 4 Study Guide
Section 4.1
1. What was Dalton’s Atomic Theory?
2. What is quantum mechanics?
Section 4.2
1. What is an isotope?
Section 4.3
1. How many orbitals are in the s, p, d, and f subshells?
Section 4.4
1. The rows of the periodic table are called
are called
or
.
, and the columns
2. Which element’s configuration ends with 4p3?
Section 4.5
1. As you move from left to right across the periodic table, the
atomic number
by one.
2. What is ionization energy?
3. What is electron affinity?
Section 4.6
1. What is electromagnetic radiation?
2. What is wavelength?
3. What is frequency?
Section 4.7
1. What is the ground state?
2. What is the excited state?
Answer Key
Section 4.1
1. John Dalton’s atomic theory was based on experiments
performed in the early 1800s. It stated that:
 All matter is made of tiny particles, called atoms.
 An atom cannot be created, divided, destroyed, or
changed into any other type of atom
 Atoms of the same element are identical in their
properties.
 Atoms of different elements are different in their
properties.
 Atoms of different elements combine in whole-number
ratios to form compounds.
 Chemical changes join, separate, or rearrange atoms in
compounds.
2. Quantum mechanics is the study of very tiny particles and how
they behave.
Section 4.2
1. Atoms of the same element with a different number of
neutrons are called isotopes.
Section 4.3
1. There are 2 orbitals in the s shell, 6 orbitals in the p shell, 10
orbitals in the d shell, and 14 orbitals in the f shell.
Section 4.4
1. periods, groups or families
2. As (Arsenic)
Section 4.5
1. increases
2. Ionization energy is the amount of energy needed to pull away
the outermost electron from an atom.
3. Electron affinity is the energy released when an electron is
added to an atom.
Section 4.6
1. Electromagnetic radiation is energy in a wave form that has
electric and magnetic fields.
2. Wavelength is the length that it takes for one full cycle of the
wave to be completed.
3. Frequency is the number of waves completed per second and it
is measured in hertz.
Section 4.7
1. The ground state is the energy level that the electron was
originally in.
2. The excited state is the energy level that the electron hops out
to, which is equal to the energy of the photon.