Chemistry Chapter 3 Section 1

Chemistry Chapter 3 Section 1

Multiple Choice

Early attempts to classify matter were based on the order of what?

• atomic number

• atomic mass

• states of matter

• mass number

Multiple Choice

What were the groups that J.W. Dobereiner developed to classify elements called?

• triads

• cuplets

• quads

• families

Multiple Choice

What was the triad chlorine, iodine, and bromine called?

• noble triad

• halogen triad

• alkaline earth triad

• alkali triad

Multiple Choice

Which is true about triads?

• highest atomic mass minus lowest atomic mass equals middle elements atomic mass

• highest atomic mass plus lowest atomic mass equals middle elements atomic mass

• highest atomic mass plus lowest atomic mass divided by two equals close to middle elements atomic mass

• highest atomic mass times lowest atomic mass equals middle elements atomic mass

Multiple Choice

What is the other property that has the same truth about the average of lowest and highest equaling middle element?

• volume

• reactivity

• density

• color

Multiple Choice

What was good about the triads?

• Showed value of recognizing patterns

• gave exact information about all elements

• lead directly to a periodic table

• helped explain energy transfer

Multiple Choice

Who made the first periodic table?

• Mendeleev

• Mosely

• Dalton

• Lavoisier

Multiple Choice

When did Mendeleev start a new column?

• when he found an element with the next atomic number

• when he found an element with the next mass number

• when he found an isotope of hydrogen

• when he found an element with properties similar to one already in a column

Multiple Choice

What was a blank space in Mendeleev's table, according to Mendeleev?

• an undiscovered element

• a nonexistent element

• an isitope of an element

• an allotrope of an element

Multiple Choice

Which is not an example of periodicity?

• Halley's comet

• 28 day moon cycle

• days of the week

• varying whether patterns

Multiple Choice

Whose idea was it to use the order of atomic number on the periodic table, as it is now?

• Mosely

• Mendeleev

• Lavoisier

• Rutherford

Multiple Choice

What is the name of the statement that physical and chemical properties of elements repeat regular patterns when arranged by atomic number called?

• law of conservation of mass

• law of conservation of energy

• periodic law

• Mendeleev's principle