WorksheetsChapter 1 - Elements and the Periodic Table
Total questions: 21
Worksheet time: 13mins
What is Dalton's atomic theory?
How many protons and neutrons are in potassium?
How many protons and electrons are in the element Copper (Cu)?
29 protons and 29 electrons
20 protons and 20 electrons
32 protons and 29 electrons
35 protons and 29 electrons
What is Rutherford's atomic model?
Rutherford's atomic model states that the atom is composed of a negatively charged nucleus, which contains positively charged electrons that surround the nucleus in orbits.
Rutherford's atomic model is based on the idea that the atom is a solid, indivisible sphere, which contains fixed orbits.
Rutherford's atomic model describes the atom as a small, dense, positively charged nucleus surrounded by negatively charged electrons that revolve in circular paths known as orbits.
Rutherford's atomic model proposes that the electrons are located in fixed orbits around the nucleus.
Which group does chlorine (Cl) belong to?
Earth metal
Alkali metal
Noble gases
Halogen
What is a Lewis diagram?
Which of the following images is the correct Bohr structure for Boron (B)?
Which group does the element sodium (Na) belong to?
Alkali metals
Noble gases
Alkaline earth metals
Halogens
What is atomic mass?
The average mass of an element calculated through the mass of protons and electrons, subtracted by the average amount of neutrons based on abundance of isotopes
The average mass of an element calculated using the mass of all the protons, neutrons, electrons and the relative abundance of isotopes
The volume of an atom in terms of all the protons, neutrons, electrons and the relative abundance of isotopes in the element
The weight of the element based on how much it weighs in space
What is the atomic number of oxygen (O)?
Which of the following elements belong to the non-metal class?
Hydrogen, Oxygen, Nitrogen, Carbon, Phosphorus, Sulfur
Sodium, Potassium, Calcium
Iron, Copper, Zinc
Helium, Neon, Argon
What happens to electronegativity as you move down the periodic table?
Increases
Decreases
Stays the same
Fluctuates
Which of the following groups is known to be inert, stable, and have low chemical reactivity?
Why does electronegativity increase across the periodic table from left to right?
Electrons repel each other more as they are added to the same energy level.
The size of the atom decreases, causing the electrons to be closer to the nucleus.
The number of protons decreases, leading to a stronger attraction for the electrons.
The elements gain more protons, pulling the electrons closer to the nucleus.
In the periodic table, Ionization energy ____ left to right, and ____ down a periodic table.
What is the noble gas (shorthand) electron configuration of the atom magnesium (Mg)?
[Ne] 3s2
2s2 2p6 3s2
[He] 2p6 3s2
[Ne] 3s1
Which list is in the correct order from largest to smallest atomic radius?
Li, Na, K, B, C
K, Na, Li, C, B
K, B, C, Na, Li
K, Na, Li, B, C
What is the longhand electron configuration for the element sulfur (S)?
1s2 2s2 2p6 3s2 3p3
1s2 2s2 2p6 3s1 3p5
1s2 2s2 2p6 3s2 3p4
1s2 2s2 2p6 3s3 3p3
What is the atomic number of the element whose shorthand electron configuration is [Ar] 4s2 3d10 4p2?
25
28
32
15
What is the longhand electron configuration of the calcium ion (Ca2+)?
1s2 2s2 2p6 3s2 3p3
1s2 2s2 2p6 3s2 3p5
1s2 2s2 2p6 3s2 3p6
1s2 2s2 2p6 3s2 3p4
Which of the following elements is denoted by the electron configuration [He] 2s¹?
O
He
Li
Na
