Problema 5c
Write the names for the elements in each of the following formulas of compounds used in medicine:
c. Demerol, C15H22ClNO2
Problema 6a
Write the names for the elements in each of the following formulas of compounds used in medicine:
a. salt substitute, KCl
Problema 7a
Identify the group or period number described by each of the following:
a. contains C, N, and O
Problema 7b
Identify the group or period number described by each of the following:
b. begins with helium
Problema 10a
Give the symbol of the element described by each of the following:
a. the alkaline earth metal in Period 2
Problema 11e
Identify each of the following elements as a metal, a nonmetal, or a metalloid:
e. located in Group 8A (18)
Problema 12a
Identify each of the following elements as a metal, a nonmetal, or a metalloid:
a. located in Group 2A (2)
Problema 14b
Using TABLE 4.4, identify the function of each of the following in the body and classify each as an alkali metal, an alkaline earth metal, a transition element, or a halogen:
b. Cu
Problema 15a
Using the Chemistry Link to Health: Elements Essential to Health, answer each of the following:
a. What is a macromineral?
Problema 15b
Using the Chemistry Link to Health: Elements Essential to Health, answer each of the following:
b. What is the role of sulfur in the human body?
Problema 15c
Using the Chemistry Link to Health: Elements Essential to Health, answer each of the following:
c. How many grams of sulfur would be a typical amount in a 60.-kg adult?
Problema 16a
Using the Chemistry Link to Health: Elements Essential to Health, answer each of the following:
a. What is a micromineral?
Problema 17a
Identify each of the following as describing either a proton, a neutron, or an electron:
a. has the smallest mass
Problema 22c
Is each of the following statements true or false?
c. Neutrons repel each other.
Problema 23
On a dry day, your hair flies apart when you brush it. How would you explain this?
Problema 24
Sometimes clothes cling together when removed from a dryer. What kinds of charges are on the clothes?
Problema 25c
Would you use the atomic number, mass number, or both to determine each of the following?
c. number of particles in the nucleus
Problema 25d
Would you use the atomic number, mass number, or both to determine each of the following?
d. number of electrons in a neutral atom
Problema 29a
How many protons and electrons are there in a neutral atom of each of the following elements?
a. argon
Problema 36c
Write the atomic symbol for the isotope with each of the following characteristics:
c. 25 electrons and 28 neutrons
Problema 37a
Argon has three naturally occurring isotopes, with mass numbers 36, 38, and 40.
a. Write the atomic symbol for each of these atoms.
Problema 37b
Argon has three naturally occurring isotopes, with mass numbers 36, 38, and 40.
b. How are these isotopes alike?
Problema 37c
Argon has three naturally occurring isotopes, with mass numbers 36, 38, and 40.
c. How are they different?
Problema 37d
Argon has three naturally occurring isotopes, with mass numbers 36, 38, and 40.
d. Why is the atomic mass of argon listed on the periodic table not a whole number?
Problema 42
Indium consists of two isotopes, 11349In and 11549In. If the atomic mass for indium on the periodic table is 114.8, are there more atoms of 11349In or 11549In in a sample of indium?
Problema 54e
What is the group number and number of valence electrons for each of the following elements?
e. barium
Problema 55c
Write the group number and draw the Lewis symbol for each of the following elements:
c. calcium
Problema 55e
Write the group number and draw the Lewis symbol for each of the following elements:
e. gallium
Problema 66
Fill in the following blanks using larger or smaller, higher or lower. Mg has a _______ atomic size and a _______ ionization energy than Cs.
Problema 71d
Complete each of the statements a to d using 1, 2, or 3:
1. decreases
2. increases
3. remains the same
Going down Group 6A (16),
d. the number of valence electrons _________
Ch.4 Atoms and Elements
