The Smallest Bit
Chemical Symbols
Models
Vocabulary
I LOVE Science!
100
The smallest units of matter.
Atoms
100
The place to find the symbols of elements.
Periodic table
100
Which of these models best shows the actual appearance of a molecule? (Space filling or ball and stick)
Space filling model.
100
Anything with volume and mass.
Matter
100
A prediction to a scientific question or problem.
Hypothesis
200
A substance made up of only on type of atom is called a(n) _____.
A) element
B) molecule
C) compound
D) crystal
element
200
Which of these symbols represent an element in the periodic table?
C
CO
H2O
H2O2
C
200
In the marshmallow lab, what did a single marshmallow represent?
A single marshmallow represented an atom.
200
The basic building block of matter.
Atom
200
Which of these substances is the least dense?
Lamp oil
300
The particle charge in the nucleus of an atom that has a positive charge.
proton
300
Which of the following molecules are found in the periodic table?
H2O (water)
CH4 (methane)
C6H12O6 (sugar)
None of these
None of these. The periodic table contains elements, not molecules.
300
In the marshmallow lab, what do the toothpicks represent?
The toothpicks represent chemical bonds.
300
The smallest unit of a compound.
Molecule
300
Which of these statements is a claim?
A) Objects that are less dense than water will float.
B) The plant grew 2 cm in one week.
C) The results show that rose bushes do not produce flowers in dim light.
Objects that are less dense than water will float.
400
Chart C
400
How many protons are in a hydrogen atom?
There is one proton. The atomic number is the number of protons in an atom.
400
In the marshmallow lab, you modeled a hydrogen diatom (H2) and an oxygen diatom (O2). What is a diatom?
A diatom is occurs when two of the same type of atoms are chemically bonded. (di = two)
400
Solid material whose atoms are arranged in an ordered patter.
Crystal
400
Which of these is an observation?
A) Over time, the green paper faded in the sun.
B) The temperature tomorrow will rise to 75 degrees.
C) Pepsi tastes better than Coke.
Over time, the green paper faded in the sun.
500
Which of these is a compound?
A) Oxygen gas (O2)
B) Ozone (O3)
C) Water (H2O)
D) Helium (He)
Water is a compound because it is bonded together by two DIFFERENT elements.
500
In the molecule H2O, what does the subscript "2" represent?
There are two hydrogen atoms in a molecule of water.
500
Both of these models represent a certain type of solid. Which one is a crystal? How do you know?
The one on the left is a crystal because it is an extended structure that repeats.
500
Matter with consistent properties throughout.
A) matter
B) substance
C) crystal
D) molecule
B) substance
500
Name the five types of observations.
Touch, taste, smell, sight, hear