Conversion between amounts 2

Match each type of element to the general area on the periodic table where it is found. Instructions 1. metal 2. nonmetal 3. metalloid -small group at the upper right of the periodic table -the majority of elements on the periodic table - narrow diagonal strip beginning at B and ending at At

1. metal: the majority of elements on the periodic table 2. nonmetal: small group at the upper right of the periodic table 3. metalloid: narrow diagonal strip beginning at B and ending at At

1.52 × 10^24 atoms of Au corresponds to_____ mol of Au atoms. Report your answer to 3 significant figures, using decimal notation (NOT scientific notation). (Avogadro's number is 6.022 × 1023.)

Blank 1: 2.52 or 2.53

The number of entities in a mole (to 4 significant figures) is equal to ___ multiplied by 10 to the power of ____ and is called Avogadro's number.

Blank 1: 6.022 or 6.023 Blank 2: 23

The elements are arranged in the periodic table in order of increasing ____ number. The vertical columns of the table are called ____ or families and the horizontal rows are called ___.

Blank 1: atomic Blank 2: groups or group Blank 3: periods

The ____ mass of a substance is the mass expressed in units of ____ per one mole of the substance.

Blank 1: molar Blank 2: grams or g

The _____ is the SI unit that expresses the amount of substance. Specifically, it is defined as the amount of substance containing the same number of entities as the number of ____ in exactly 12 g of carbon-12.

Blank 1: mole or mol Blank 2: atoms or carbon atoms

Match each group in the periodic table with the correct name as indicated. Group 1 Alkaline earth metals Group 2 Halogens Group 17 Group 18 Alkali metals

Group 1: Alkali metals Group 2: Alkaline earth metals Group 17: Halogens Group 18: Noble gases

Match each of the following types of element with the correct description. Instructions Metal Non-metal Metalloid - An element that has properties between those of metals and nonmetals - An element that is a good conductor of heat and electricity, has a shiny surface, and is malleable and ductile - An element that is generally a gas or a dull brittle solid at room temperature, and is a poor conductor of heat and electricity

Metal: An element that is a good conductor of heat and electricity, has a shiny surface, and is malleable and ductile Non-metal: An element that is generally a gas or a dull brittle solid at room temperature, and is a poor conductor of heat and electricity Metalloid: An element that has properties between those of metals and nonmetals

Classify each element correctly according to the group it belongs to. Instructions Ne Alkali metal Na Alkaline earth metal Ca Halogen Cl Noble gas

Ne: Noble Gas Na: Alkali metal Ca: Alkaline earth metal Cl: Halogen

Classify each element correctly according to its general position on the periodic table. Instructions S main group metal Cu metalloid Ca transition metal Si nonmetal

S nonmetal Cu transition metal Ca main group metal Si metalloid

Which of the following statements correctly describe molar mass? Select all that apply. a. Since neon has an atomic mass of 20.18, its molar mass is 20.18 g/mol. b. Molar masses are expressed in g/mol. c. The term "molar mass" applies to compounds but not to elements. d. The molar mass of a substance equals the number of moles in one gram of the substance.

a. Since neon has an atomic mass of 20.18, its molar mass is 20.18 g/mol. b. Molar masses are expressed in g/mol.

Which of the following statements correctly describe groups and regions of the periodic table? Select all that apply. a. Transition metals are found in Groups 3-11. b. Elements of Period 1 are called the noble gases. c. Group 17 elements are the chalcogens. d. Group 2 elements are called alkaline earth metals. e. The elements B, Si, and As are included among the metalloids.

a. Transition metals are found in Groups 3-11. d. Group 2 elements are called alkaline earth metals. e. The elements B, Si, and As are included among the metalloids.

True or false: A 16.00-g sample of oxygen atoms contains the same number of particles as a 4.003-g sample of He atoms. a. True b. False

a. True 1mol He 4.03 g He x ---------- = 1.00 mol He 4.03g He 1 mol O 16.00g O= ---------- = 1.000 mol O 16.00 g O

Which of the following options correctly show how to convert between the units given? Select all that apply.

a. mole= mass/ molar mass b. number of atoms= (mass/molar mass) * Avogadro's number

Match each mathematical operation to the correct quantity calculated in each case. a. moles b. mass c. number of atoms

a. moles ( g/ g mol) b. mass (mol)( g/mol) c. number of atoms (mol) ( Avogrados number)

Select all that apply Which of the following options give the correct number of moles AND the correct number of atoms in a 3.54-g sample of copper (Cu)? Avogadro's number is 6.022 × 10^23. Select both correct answers. a. 9.25 × 10^-26 atoms of Cu b. 3.35 × 10^22 atoms of Cu c. 2.25 × 10^2 mol of Cu d. 5.57 × 10^-2 mol of Cu

b. 3.35 × 10^22 atoms of Cu d. 5.57 × 10^-2 mol of Cu

Which of the following statements correctly describe the arrangement of the periodic table? Select all that apply. a. Elements in the periodic table are arranged in order of increasing atomic mass. b. The elements in the large lower-left portion of the periodic table are metals. c. The horizontal rows of the periodic table are called periods. d. Some groups are given special names. e. The groups are numbered 1 to 7.

b. The elements in the large lower-left portion of the periodic table are metals. c. The horizontal rows of the periodic table are called periods. d. Some groups are given special names. Reason: Elements are arranged in order of atomic number, not atomic mass. Occasionally an element with a higher atomic number actually has a smaller atomic mass (e.g., compare Ar and K, and Co and Ni). Reason: Groups are numbered 1-18.

Which of the following correctly reflect Avogadro's number? Choose all that apply. a. The mole is abbreviated mo. b. The number of entities in a mole is called Avogadro's number. c. For a pure substance, the mole specifies only the number of entities in a sample. d. The mole contains 6.022 x 10^23 entities.

b. The number of entities in a mole is called Avogadro's number. d. The mole contains 6.022 x 10^23 entities.

Which of the following statements correctly describe the relationship between the number of particles in a sample and its mass? Select all that apply. a. 10.00-g sample of Li atoms contains the same number of atoms as a 10.00-g sample of Ar atoms. b. Two samples may contain the same number of atoms but have different masses. c. Two different samples of C-12 atoms that have the same mass must contain the same number of atoms. d. The number of Ne atoms in a sample can be determined from the mass of the sample.

b. Two samples may contain the same number of atoms but have different masses. c. Two different samples of C-12 atoms that have the same mass must contain the same number of atoms. d. The number of Ne atoms in a sample can be determined from the mass of the sample.

How many moles of Mg atoms are in 52.0 g of Mg? a. 0.468 mol b. 126 mol c. 2.14 mol d. 7.94 × 10-4 mol

c. 2.14 mol 1 mol 52.0g -------- = mol 24.31g

What is the mass of 3.50 mol of Zn atoms? a. 0.0535 g b. 18.7 g c. 229 g

c. 229 g Reason: 65.39 g Zn 3.50 mol × ------------- = 229 g 1 mol Zn

Which of the following correctly reflects Avogadro's number? a. 6.022×10^23 entities/ 1amu b. 6.022×10^23 entities × 1 mol c. 6.022×10^23 entities/ 1 gram d. 6.022×10^23 entities/ 1 mol

d. 6.022×10^23 entities/ 1 mol