Chemistry 11

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Chemistry 11


Froggy Jumps Chemistry 11Versión en línea Summative Test por Angeline De Castro 1 Which component of a scientific measurement is represented by the “unit”? a The margin of error in an experiment b The standard of comparison used alongside the number c The name of the measuring instrument 2 In every measurement, which part specifically expresses the magnitude, or “how much,” of the quantity involved? a The unit b The number c The uncertainty 3 The metric system used internationally as the standard for scientific measurement is also known as the: a Imperial System b International System of Units (SI) c Standard Measurement Index 4 Measurement serves as the foundation of: a Random guesses about matter b Artistic interpretations of nature c Scientific laws, theories, and experiments 5 A sponge and a brick of the same size are compared. The brick is expected to have greater density mainly because: a Its mass is more tightly packed within the same volume b It is a different color from the sponge c It contains more empty air spaces 6 A liquid sample has a mass of 24 g and a volume of 12 mL. What is its density? a 0.5 g/mL b 2 g/mL c 36 g/mL 7 A liquid has a density of 4 g/mL and a volume of 15 mL. What is its mass? a 60 g b 19 g c 4 g 8 When evaluating the accuracy of a measurement, the “true value” being compared against refers to: a The very first reading taken b . The average of only two trials c The widely accepted or reference value for that quantity 9 How can a scientist check whether a set of measurements is precise? a By comparing the measurements once to a textbook value b By performing repeated measurements and checking how closely they agree with each other c By rounding all values to the same number of digits 10 A student measures the boiling point of water three times and gets very different readings each time, yet the average of the three happens to match the accepted boiling point exactly. This situation best illustrates: a High accuracy but low precision b Neither accurate nor precise results c High precision but low accuracy 11 According to the rules for identifying significant figures, nonzero digits in a measurement are: a Always significant b Never significant c Significant only if they appear after a decimal point 12 When a decimal point is moved to the left while converting a number into scientific notation, the exponent becomes: a Positive b Negative c Undefined 13 Which figure is credited as the first true “chemist” for performing quantitative experiments and offering the first experimental definition of an element? a Robert Boyle b Antoine Lavoisier c John Dalton 14 The Law of Multiple Proportions, associated with Dalton, states that when two elements form a series of compounds, the mass ratios of the second element combining with a fixed mass of the first can be reduced to: a Small whole numbers b Decimal fractions only c Percentages of 100 15 When naming a binary molecular compound made of two nonmetals, which element in the formula always receives a numerical prefix? a Only the first element b Neither element c The second element, regardless of its subscript 16 According to popular accounts of alchemy, what did alchemists famously attempt to do with ordinary elements? a Transform them into gold b Freeze them into crystals c Convert them into water 17 Which scientist independently published his own periodic table of elements, organized by increasing atomic mass, around the same time as Mendeleev? a Johann Döbereiner b John Newlands c Lothar Meyer 18 Which symbol or notation indicates that a substance is dissolved in water within a chemical equation? a (s) b (l) c (aq) 19 Elements in Group 2 typically lose two electrons to form ions with a charge of: a 1+ b 2+ c 2- 20 Using experiments with cathode-ray tubes, J.J. Thomson postulated the existence of negatively charged particles now known as: a Electrons b Protons c Neutrons

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Chemistry 11

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Froggy Jumps

Chemistry 11Versión en línea

por Angeline De Castro

Which component of a scientific measurement is represented by the “unit”?

In every measurement, which part specifically expresses the magnitude, or “how much,” of the quantity involved?

The metric system used internationally as the standard for scientific measurement is also known as the:

Measurement serves as the foundation of:

A sponge and a brick of the same size are compared. The brick is expected to have greater density mainly because:

A liquid sample has a mass of 24 g and a volume of 12 mL. What is its density?

A liquid has a density of 4 g/mL and a volume of 15 mL. What is its mass?

When evaluating the accuracy of a measurement, the “true value” being compared against refers to:

How can a scientist check whether a set of measurements is precise?

A student measures the boiling point of water three times and gets very different readings each time, yet the average of the three happens to match the accepted boiling point exactly. This situation best illustrates:

According to the rules for identifying significant figures, nonzero digits in a measurement are:

When a decimal point is moved to the left while converting a number into scientific notation, the exponent becomes:

Which figure is credited as the first true “chemist” for performing quantitative experiments and offering the first experimental definition of an element?

The Law of Multiple Proportions, associated with Dalton, states that when two elements form a series of compounds, the mass ratios of the second element combining with a fixed mass of the first can be reduced to:

When naming a binary molecular compound made of two nonmetals, which element in the formula always receives a numerical prefix?

According to popular accounts of alchemy, what did alchemists famously attempt to do with ordinary elements?

Which scientist independently published his own periodic table of elements, organized by increasing atomic mass, around the same time as Mendeleev?

Which symbol or notation indicates that a substance is dissolved in water within a chemical equation?

Elements in Group 2 typically lose two electrons to form ions with a charge of:

Using experiments with cathode-ray tubes, J.J. Thomson postulated the existence of negatively charged particles now known as: