What is wrong with each of the following statements?

(a) The symbol for tin is Ti.

(b) The symbol for manganese is Mg.

( c) The symbol for potassium is Po.

(d) The symbol for helium is HE.

What are the symbols for the following elements? (a) Gadolinium (used in color TV screens) (b) Germanium (used in semiconductors) (c) Technetium (used in biomedical imaging) (d) Arsenic (used in pesticides)

a. What is the atomic number of an element? b. What is the mass number of an isotope? c. In the nuclear symbol for deuterium, 2/1H, identify the atomic number and the mass number.

Copy and complete the following table concerning the three isotopes of silicon, whose atomic number is 14.

$$\begin{matrix} \text{Isotope} & \text{Number of protons} & \text{Number of electrons} & \text{Number of neutrons}\\ \text{Si-28} & \text{ } & \text{ } & \text{ }\\ \text{Si-29} & \text{ } & \text{ } & \text{ }\\ \text{Si-30} & \text{ } & \text{ } & \text{ }\\ \end{matrix}$$

a. What are isotopes? b. How are the isotopes of a particular element alike? c. How are they different?

Classify the following elements as metals, nonmetals, or semimetals:

(a) Ti

(b) Te

(c) Se

(d) Sc

(e) Si

Where in the periodic table are the metallic elements found? Where are the nonmetallic elements found?

Where in the periodic table are the metallic elements found? Where are the nonmetallic elements found?

Administration of digitalis, a drug used to control atrial fibrillation in heart patients, must be carefully controlled because even a modest overdose can be fatal. To take differences between patients into account, drug dosages are prescribed in terms of mg/kg body weight. Thus, a child and an adult differ greatly in weight, but both receive the same dosage per kilogram of body weight. At a dosage of 20 mg/kg body weight, how many milligrams of digitalis should a 160 lb patient receive?

A Big Mac hamburger from McDonald’s contains 540 Calories.

(a) How many kilojoules does a Big Mac contain?

(b) For how many hours could the amount of energy in a Big Mac light a 100 watt lightbulb? (1 watt = 1 J/s)

How large, in cubic centimeters, is the volume of a red blood cell (in cm $^{3}$)if the cell has a cylindrical shape with a diameter of 6 X 10 $^{-6}$ m and a height of 2 X 10$^{-6}$ m? What is the volume in pL?

Carry out the following conversions: 0.105 in. to mm

A pure diamond has a density of 3.52 g/cm $^{3}$.Set up a dimensional-analysis equation to find the volume (cm $^{3}$) of the Hope Diamond.

Gemstones are weighed in carats, with 1 carat = 200 mg (exactly). What is the mass in grams of the Hope Diamond, the world’s largest blue diamond at 44.4 carats? What is this mass in ounces?