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Worksheets8.5A&B Review
Total questions: 20
Worksheet time: 19mins
How would you describe the nucleus of an atom?
dense, positively charged
large, positively charged
tiny, negatively charged
dense, negatively charged
At the atomic level, what makes elements reactive?
having a filled outer level
exchanging or sharing valence electrons
having the same number of electrons
having the same number of protons
An atom has 12 protons, 14 neutrons, and 12 electrons. What is the atomic number of this element?
24
26
12
38
An atom of which element has 37 protons, 48 neutrons and 1 valence electron?
Neon (Ne)
Carbon (C)
Rubidium (Rb)
Sodium (Na)
An atom of which element is represented by this model?
Neon (Ne)
Boron (B)
Nitrogen (N)
Carbon (C)
What part of the atom determines the identity of an atom?
Electrons
Neutrons
Protons
Nucleus
What part of the atom determines the chemical properties or reactivity?
Protons
Electrons
Valence Electrons
Energy levels
A chemist is identifying the elements present in a sample of seawater. What characteristic of an element's atoms always determines the element's identity?
The number of electrons
The number of neutrons
The number of protons
The number of valence electrons
An atom of which element is represented by this model?
Carbon (C)
Neon (Ne)
Sodium (Na)
Boron (B)
An atom has 11 protons, 12 neutrons, and 11 electrons. What is the identity of the element?
Sodium
Titanium
Vanadium
Magnesium
Four students were asked to name the parts of an atom that determine the atom’s identity and chemical properties. The students’ responses are shown in the table below.
Student 1
Student 2
Student 3
Student 4
How many valence electrons does the atom of Carbon-14, shown above have?
14
10
6
4
All atoms are most stable with (or would "prefer") how many electrons in their valence shell?
1
2
8
18
What are valence electrons?
The total number of electrons in an atom
The number of electrons in the outermost shell
The number of electrons in the second shell
The number of protons in the outermost shell
Which statement correctly describes the location and charge of the electrons in an atom?
The electrons are inside the nucleus and have no charge
The electrons are outside the nucleus and have no charge
The electrons are inside the nucleus and have a negative charge
The electrons are outside the nucleus and have a negative charge
How many protons, neutrons and electrons are present in an atom of hafnium, Hf, with a mass number of 178?
A model of a beryllium atom is shown in the image. What types of particles are found in the cloud surrounding the atom's nucleus?
positively charged particles and negatively charged particles
negatively charged particles only
neutral particles and positively charged particles
positively charged particles only
An atom has 25 protons, 30 neutrons and 25 electrons. What is the charge of the atom's nucleus?
+25
+30
-25
-30
Lithium is a metallic element that has three protons, three electrons, and four neutrons. Which drawing represents the atomic structure of lithium?
A
B
C
D
Which group of lists best summarizes the subatomic particles and their electrical charge?
proton, negative
neutron, positive
electron, no charge
proton, positive
neutron, no charge
electron, negative
proton, positive
neutron, negative
electron, no charge
proton, no charge
neutron, positive
electron, negative
