Elements & The Periodic Table
Which of the following is not a metal? (Magnesium, Fluorine, Sodium, Calcium)
What is Fluorine?
What is an isotope?
What is an element that has a different number of neutrons?
Which of the following is a physical change?
a) Burning firewood
b) Digesting food
c) Boiling water
d) Lighting a firework
What is c) Boiling water?
The formula for density is ____.
What is Density = Mass ÷ Volume?
The Bohr-Rutherford diagram shows ____.
What is the arrangement of electrons around the nucleus?
What type of substance is water?
What is a compound?
What type of ion has a positive charge?
What is a cation?
What happens to the molecular composition of a substance during a physical change?
What is that the molecules stay the same, but their arrangement or state changes?
What is the term for a property that compares the mass of an object to its volume?
What is density?
The outermost electrons in an atom are called ____.
What are valence electrons?
Which of the following is not a chemical family on the periodic table? (Alkali Metals, Holograms, Noble Gases, Alkaline Earth Metals)
What is Holograms?
A Lewis-Dot Structure represents which part of an atom?
What is the valence shell?
What is the difference between a physical change and a chemical change?
What is that a physical change does not alter the substance’s identity, while a chemical change creates a new substance with different properties?
A block has a mass of 500 g and a volume of 250 cm³. What is its density?
What is 2.0 g/cm³? (Density = 500 ÷ 250)
In a Bohr-Rutherford diagram, where are protons and neutrons located?
What is in the nucleus?
Name and describe two chemical families on the periodic table.
What are Alkali Metals and Noble Gases? (Alkali Metals are highly reactive and have one valence electron, while Noble Gases are stable and non-reactive with a full outer shell.)
The second shell of a Bohr-Rutherford diagram can hold a maximum of how many electrons?
What is 8?
A scientist observes that when two clear liquids are mixed, a yellow solid forms at the bottom of the beaker. What type of change has occurred, and how do you know?
What is a chemical change, because a solid has formed, which is a sign of a new substance being created?
A liquid has a density of 1.2 g/mL. If you pour 10 mL of this liquid into a container, what is its total mass?
What is 12 g? (Mass = Density × Volume → 1.2 × 10)
Draw the Bohr-Rutherford diagram and Lewis-Dot Structure for Neon.
What is..
Bohr Rutherford Diagram - 10P, 10N, 2 electrons in first shell, 8 electrons in valence shell
Lewis Dot Structure - Ne surrounded by 8 electrons
How is an element different from a compound?
What is that an element consists of only one type of atom, while a compound is made up of two or more different elements chemically combined?
What subatomic particles are found in the nucleus of an atom?
What are protons and neutrons?
Why is boiling water a physical change but burning firewood a chemical change?
What is because boiling water only changes its state (liquid to gas), while burning firewood creates new substances like ash, smoke, and gases, which cannot be reversed?
A rectangular object has a mass of 600 g. Its dimensions are 4 cm × 5 cm × 6 cm. Find its density.
What is 5 g/cm³? (Volume = 4 × 5 × 6 = 120 cm³ → Density = 600 ÷ 120)
Identify the element described by this Bohr-Rutherford diagram: 2 electrons in the first shell, 8 in the second shell, and 2 in the third shell.
What is Magnesium (Mg)?