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WorksheetsChemistry 1 Midterm Part 1 - Atoms
Total questions: 16
Worksheet time: 8mins
Who is credited with proposing the atomic theory, including the postulate that all matter is composed of atoms?
Chadwick
Dalton
Rutherford
Thomson
Which scientist proposed that electrons travel in fixed paths?
Bohr
Chadwick
Dalton
Thomson
Which of these models includes a well-defined nucleus?
W and X
W and Y
X and Z
Y and Z
What is the mass of a carbon atom with 6 protons, 7 neutrons, and 6 electrons?
6
7
13
19
According to the periodic table, which element is a metal?
Carbon (C)
Copper (Cu)
Neon (Ne)
Silicon (Si)
How many protons, neutrons, and electrons are present in a neutral atom of magnesium-26?
12 protons, 26 neutrons, and 12 electrons
12 protons, 12 neutrons, and 14 electrons
12 protons, 14 neutrons, and 12 electrons
26 protons, 12 neutrons, and 26 electrons
Where are atoms with low electronegativity located on the periodic table?
lower left
lower right
upper left
upper right
Examine the Lewis dot structure of element X. In which group on the periodic table does element X belong?
same group as phosphorus
same group as boron
same group as calcium
same group as argon
The early periodic table grouped elements based on similar properties. Which element would be grouped with sodium using this principle?
magnesium
potassium
sulfur
zinc
Which of these elements has an electron structure most similar to that of element X?
1
2
3
4
Which atom has one valence electron?
argon (Ar)
carbon (C)
fluorine (F)
lithium (Li)
According to the periodic table, which element contains 12 protons?
carbon (C)
chromium (Cr)
magnesium (Mg)
zinc (Zn)
How many electrons are represented in the Lewis dot structure for aluminum (Al)?
3
8
4
13
The Lewis dot diagram for an unidentified element is shown below. Which element could X represent?
iron
chlorine
silicon
oxygen
According to periodic trends, which element would have more valence electrons than oxygen?
carbon (C)
chlorine (Cl)
selenium (Se)
phosphorus (P)
How does the Bohr model describe the shape of electron orbitals in an atom?
circular
eliptical
hyperbolic
linear
