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Q 1/17
Score 0
Which section of the periodic table would most likely contain elements that are brittle, poor conductors of heat and electricity, and essential in living organisms?
30
Nonmetals
Transition metals
Lanthanides
Alkali metals
Q 2/17
Score 0
Two cubes are placed in water: Cube X floats and Cube Y sinks. Which statement BEST explains this?
30
Density does not affect floating or sinking
Cube X has density less than water; Cube Y has density greater than water
Cube X is denser than water; Cube Y is less dense than water
Both cubes have the same density as water
17 questions
Q.
Which section of the periodic table would most likely contain elements that are brittle, poor conductors of heat and electricity, and essential in living organisms?
1
30 sec
Q.
Two cubes are placed in water: Cube X floats and Cube Y sinks. Which statement BEST explains this?
2
30 sec
Q.
Which observation BEST indicates that a chemical change has occurred?
3
30 sec
Q.
How many sodium (Na) atoms are present in one molecule of sodium sulfate, Naâ‚‚SOâ‚„?
4
30 sec
Q.
A strip of magnesium is placed in hydrochloric acid and bubbles form as the strip disappears. What type of change is this?
5
30 sec
Q.
A metal spoon left in hot soup becomes hot to the touch. Which process BEST explains how the spoon is heated?
6
30 sec
Q.
Which sample has particles with the GREATEST average kinetic energy?
7
30 sec
Q.
Which sample represents a homogeneous mixture?
8
30 sec
Q.
Which statement correctly classifies air?
9
30 sec
Q.
Which pair of elements is most likely to react to form an ionic compound?
10
30 sec
Q.
Which elements make up a molecule of Hâ‚‚O?
11
30 sec
Q.
A droplet forms a rounded dome on a clean penny. Which property of water MOST directly causes this shape?
12
30 sec
Q.
Water moves upward through a plant’s xylem from roots to leaves. Which explanation is MOST accurate?
13
30 sec
Q.
Three solutions have pH values: A = 3, B = 7, C = 10. Which solution is a base?
14
30 sec
Q.
Which statement about pH is TRUE for stomach acid (pH 2), water (pH 7), and soap (pH 12)?
15
30 sec
Q.
Which statement BEST explains how the equation 2H₂ + O₂ → 2H₂O demonstrates conservation of mass?
16
30 sec
Q.
Which statement BEST describes conservation of atoms in photosynthesis?
