Periodic Table Quiz
What is the chemical symbol for Potassium? a) K b) S c) Na d) N
a)K
what are isotopes?
Isotopes are forms of an element that have the same number of protons but a different number of neutrons in their atomic nuclei
Where are electrons found in an atom?
electron shells
Circle the correct answer: Air is a (element / compound / mixture).
mixture
What state of matter has particles that are tightly packed together?
Solids
What does the atomic number represent?
The number of protons in an atom of the element.
Give three isotopes of magnesium
24Mg, 25Mg, and 26Mg
Name the three main parts of an atom.
protons, neutrons, and electrons
Is water an element, compound, or mixture?
Water is a compound. A compound is formed when two or more different elements chemically combine.
Explain why gases can be compressed but solids cannot.
Gas particles are far apart with lots of space between them, allowing them to be compressed. In solids, particles are tightly packed, so there's little to no space to compress.
Which subatomic particle is NOT found in the nucleus:
Electron
Which of these is a noble gas? a) Oxygen b) Helium c) Nitrogen d) Hydrogen
b) Helium
Why is the overall charge of an atom usually neutral?
Because the number of protons (positive) equals the number of electrons (negative), balancing the charge.
How can mixtures be separated? Give two methods
Filtration and Evaporation
Explain how heating a solid affects the kinetic energy of its particles and leads to a change of state.
Heating increases the particles' kinetic energy, causing them to vibrate more vigorously. When enough energy is absorbed, the structure breaks down and the solid melts into a liquid.
An atom has an atomic number of 13 and a mass number of 27. How many protons would it have:
13
When an atom loses an electron, it becomes a(n):
cation
Match each particle to its charge and location in the atom.
Proton – Positive, Nucleus; Neutron – Neutral, Nucleus; Electron – Negative, Orbitals/Shells
A student says oxygen gas (O2) is a compound. Do you agree? Why or why not?
disagree, A compound is two or more different atoms that are bonded.
Compare the arrangement of particles in solids, liquids, and gases.
Solid – tightly packed, fixed shape; Liquid – close but can move past each other; Gas – spread out, move freely
What is the charge of a sulfur ion:
-2
What is the difference between a period and a group on the periodic table?
A period is a horizontal row (indicating energy levels), and a group is a vertical column (indicating similar chemical properties and valence electrons).
Describe how electrons are arranged in shells around the nucleus.
Electrons occupy energy levels or shells; the first shell holds up to 2 electrons, the second up to 8, and so on.
Classify the following as element, compound, or mixture: salt, gold, air.
Salt (NaCl):compound, Gold (Au):element,
Air:Mixture.
Why does plasma consist of ?
Plasma consists of ionized particles with free-moving electrons, behaving differently from gases.