CHM 1020 Chapter Notes - Chapter 2: Numeral Prefix, Chemical Equation, Chemical Reaction

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bronzecockroach647

7 Sep 2018

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This means that the same number and type of atoms must appear on both sides of the equation. Chemical reaction is process whereby substances called reactants are transformed into different substances called products. There are many more known compounds than elements - only 100 or so elements exist but over. 20 million compound have been isolated and characterized. A compound contains two or more different elements. Mixture - a mixture is a physical combination of two or more substances. Air is composed of nitrogen, oxygen, and other gases. The second element is named with its root and suffix -ide. The greek numerical prefix is always used when more than one atom is present to indicate the number of atoms of each element in the compound. The name of the first element remains unchanged, except for the addition of a prefix where appropriate. A molecule is an independent structure composed of two or more atoms chemically bonded together.

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Which of the following are true? [check all that apply] Ternary salts are compounds that result from replacing the hydrogen in a ternary acid with metal ion or ammonium ion. Ternary compound consists of two elements. Most transition metals and the metals of group 3A (except Al), 4A, and 5A exhibit more than one oxidation state, thus, they may form two or more binary compounds with the same nonmetals. Ternary acids are compounds of hydrogen, oxygen and (usually) a metal. Nearly all binary molecular compounds involve two nonmetals bonded together. Prefix tetra- represents the number five. Binary compound consists of two elements. To name binary compound, the less electronegative element is named first and the more electronegative element is named second. Binary acids arc compounds in which H is bonded to a group 6A element other than that O or to a group 7A element. To name binary ionic compounds which contains metal cations and nonmetal anions, the anion Is named first and cation

ivoryyak245

Judge the following statements as true or false. If you believe a statement to be false, provide a corrected version.
(a) Air and water are both elements.
(b) All mixtures contain at least one element and one compound.
(c) Compounds can be decomposed into two or more other substances; elements cannot.
(d) Elements can exist in any of the three states of matter.
(e) When yellow stains in a kitchen sink are treated with bleach water, the disappearance of the stains is due to a physical change.
(f) A hypothesis is more weakly supported by experimental evidence than a theory.
(g) The number 0.0033 has more significant figures than 0.033.
(h) Conversion factors used in converting units always have a numerical value of one.
(i) Compounds always contain at least two different elements.

limeseal718

Judge the followig statements as true or false. If you believe a statement to be false, provide a corrected version. (a) Air and water are both elements.

(b) All mixtures contain at least one element and one compound.

(d) Elements can exist in any of the three states of matter.

(e) When yellow stains in a kitchen sink are treated with bleach water, the disappearance of the stains is due to a physical change.

(f) A hypothesis is more weakly supported by experimental evidence than a theory.

(g) The number 0.0033 has more significant figures than 0.033.

(h) Conversion factors used in converting units always have a numerical value of one.

(i) Compounds always contain at least two different elements.

copperrabbit106

CHM 1020 Chapter Notes - Chapter 2: Numeral Prefix, Chemical Equation, Chemical Reaction

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