Chemistry Chapter 4 learning check
A. Metal B. Nonmetal C. Metalloid D. Metal E. Nonmetal
Identify each of the following elements as a metal, nonmetal, or metalloid: A. sodium (Na) B. bromine (Br) C. boron (B) D. manganese (Mn) E. carbon (C)
A. 2 B. 3 C. 1
An atom has 14 protons and 20 neutrons. A. What is its atomic number? (1) 6 (2) 14 (3) 34 B. What is its mass number? (1) 14 (2) 16 (3) 34 C. What is the element? (1) Si (2) Ca (3) Se
A. Lead has an atomic number of 82; number of protons = 82 B. number of neutrons = mass number - atomic number = 207 - 82 = 125 neutrons C. An atom is neutral, which means that the number of electrons is equal to the number of protons. Since an atom of Pb has 82 protons, it also has 82 electrons.
An atom of lead (Pb) has a mass number of 207. A. How many protons are in the nucleus? B. How many neutrons are in the nucleus? C. How many electrons are in the atom?
A. 1 B. 2 C. 3
An atom of zinc has a mass number of 65. A. How many protons are in the nucleus? (1) 30 (2) 35 (3) 65 B. How many neutrons are in the nucleus? (1) 30 (2) 35 (3) 65 C. What is the mass number of a zinc atom that has 37 neutrons? (1) 37 (2) 65 (3) 67
See slide 132
Draw the Lewis symbol for each of the following elements: A. chlorine B. selenium C. potassium
A. Phosphorus B. Argon C. Manganese D. Beryllium E. Potassium
Give the names of the elements with the following symbols: A. P B. Ar C. Mn D. Be E. K
A. Li B. F C. N D. Li
Given the following elements, answer the questions: Li N F A. Which is the largest atom? B. Which has the highest ionization energy? C. Which belongs to Group 5A (15)? D. Which has the most metallic character?
1. A. Br 2. C. Magnesium 3. B. nitrogen 4. C. chromium
Identify the element described by each of the following: 1. Group 7A (17), Period 4 A. Br B. Cl C. Mn 2. Group 2A (2), Period 3 A. beryllium B. boron C. magnesium 3. Group 5A (15), Period 2 A. phosphorus B. nitrogen C. arsenic 4. Group 6B (6), Period 4 A. copper B. selenium C. chromium
A. Li B. S C. Br
Identify the element in each pair that has the higher ionization energy. A. K or Li B. S or Si C. potassium or bromine
A. K B. Si C. Ca
Identify the element in each pair that has the more metallic character. A. K or Li B. S or Si C. potassium or bromine
A. blue light B. ultraviolet light C. X-rays
Identify the form of electromagnetic radiation in each pair that has the greater energy: A. yellow light or blue light B. ultraviolet light or infrared light C. X-rays or microwaves
A. K B. Si C. Ca
Identify the larger atom in each pair. A. K or Li B. S or Si C. Ca or Br
A. 1) absorbed B. 2) Emitted C. 3) Not changed
In each of the following energy level changes, indicate if energy is (1) absorbed, (2) emitted, or (3) not changed: A. An electron moves from the first energy level (n = 1) to the third energy level (n = 3). B. An electron falls from the third energy level to the second energy level. C. An electron moves within the third energy level.
A. False B. True C. True
Is each of the following statements true or false? A. The mass of an electron is greater than the mass of a proton. B. Protons have a positive charge, and electrons have a negative charge. C. The nucleus of an atom contains only the protons and neutrons.
The isotope Li-7 is more abundant because its mass is closer to the atomic mass of Li on the periodic table.
Lithium has two naturally occurring isotopes, Li-6 and Li-7. If the atomic mass for lithium on the periodic table is 6.941, which isotope of lithium is more abundant?
A. 1) Sn, Pb B. 2) N, P C. 3) Si, Ge
Match the elements to the description. A. Metals in Group 4A (14) (1) Sn, Pb (2) C, Si (3) C, Si, Ge, Sn B. Nonmetals in Group 5A (15) (1) As, Sb, Bi (2) N, P (3) N, P, As, Sb C. Metalloids in Group 4A (14) (1) Si, Ge, Sn, Pb (2) C, Si, Ge (3) Si, Ge
A. 1 B. 3 C. 2
Select the correct number of protons in each atom. A. Fluorine atom (F) (1) 9 protons (2) 17 protons (3) 10 protons B. Potassium (K) (1) 15 protons (2) 39 protons (3) 19 protons C. Barium atom (Ba) (1) 137 protons (2) 56 protons (3) 81 protons
The isotope K-39 is most abundant because its mass is closest to the atomic mass of K on the periodic table.
There are three naturally occurring isotopes of potassium, K-39, K-40, and K-41. If the atomic mass for potassium on the periodic table is 39.10, which isotope of potassium is most abundant?
A. 40.08 amu B. 26.98 amu C. 207.2 amu D. 13.3 amu E. 55.85 amu
Using the periodic table, specify the atomic mass of each element. A. calcium B. aluminum C. lead D. barium E. iron
A. group 2A (2); 2 valence electrons B. group 8A (18); 8 valence electrons C. group 4A (14); 4 valence electrons
Using the periodic table, write the group number and the number of valence electrons for each of the following elements: A. strontium B. argon C. silicon
A. Electron B. Proton C. Neutron
Which of the following subatomic particles fits each of the descriptions below? proton, neutron, electron A. found outside the nucleus B. has a positive charge C. has mass but no charge
A. 16 O 8 B. 37 Cl 17 C. 107 Ag 47
Write the atomic symbols for atoms with the following subatomic particles: A. 8 protons 8 neutrons 8 electrons B. 17 protons 20 neutrons 17 electrons C. 47 protons 60 neutrons 47 electrons
A. I B. Fe C. Mg D. Zn E. Li
Write the correct chemical symbols for each of the following elements: A. iodine B. iron C. magnesium D. zinc E. lithium
1. C- atomic number = 6 2,4 2. Si- atomic number = 14. 2,8,4 3. Na- atomic number = 11 2,8,1 4. N- atomic number = 7 2,5
Write the electron arrangements for the following elements: 1. C 2. Si 3. Na 4. N