Identify that protons determine an element's identity and valence electrons determine its chemical properties, including reactivity;
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Q 1/9
Score 0
A model of an atom is shown below. An atom of which element is represented by this model?
60
Sodium (Na)
Neon (Ne)
Carbon (C)
Boron (B)
Q 2/9
Score 0
When trying to identify an unknown element, a scientist determines what other elements the unknown element reacts with chemically. Which property of the unknown element determines the other elements it reacts with?
60
The total number of particles in the nucleus of the unknown element
The number of protons in the nucleus of the unknown element
The total number of neutrons in the unknown element
The number of valence electrons in the unknown element
9 questions
Q.
A model of an atom is shown below. An atom of which element is represented by this model?
1
60 sec
8.5b
Q.
When trying to identify an unknown element, a scientist determines what other elements the unknown element reacts with chemically. Which property of the unknown element determines the other elements it reacts with?
2
60 sec
8.5b
Q.
The atoms of a certain element each contain 11 protons and 1 valence electron. Which statement correctly identifies this element and describes its chemical reactivity?
3
60 sec
8.5b
Q.
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?
4
60 sec
8.5b
Q.
A chemist made the table below to record some atomic properties of four elements. Based on the information in the table, which conclusion about the chemical reactivity of these elements is valid?
5
60 sec
8.5b
Q.
6
60 sec
8.5b
Q.
The table below lists three characteristics of an atom of an element. An atom of which element is described by the data in the table?
7
60 sec
8.5b
Q.
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. Which student’s responses are correct?
8
60 sec
8.5b
Q.
Tin, Sn, is a soft white metal. It has a low melting point compared with other metals. Tin is widely used as a coating for cans of food. Which statement accurately describes atoms of tin?
