Atoms
Elements
Periodic Table
Metals / Nonmetals
Metalloids
100
When an atom that has no charge loses two electrons, it becomes a
Positive ion
100
Cecil is working with samples of chlorine (Cl), oxygen (O), bromine (Br), and silver (Ag). The samples are all at room temperature. Which substance is most likely the most dense?
Silver
100
Which lists only metalloids?
boron (B), germanium (Ge), and tellurium (Te)
100
Which properties make a metal a good material to use for electrical wires?
Conductivity and ductility
100
Which properties are characteristic of metalloids?
Intermediate conductivity and a high melting point
200
Atom A and Atom B have the same number of protons and neutrons, but they do not have the same number of electrons.
The atoms have the same chemical symbol.
200
Which element is most likely to be shiny?
Calcium
200
Which lists the elements in order from most conductive to least conductive?
potassium (K), germanium (Ge), selenium (Se)
200
What trend does the reactivity of most nonmetals show in a periodic table, excluding the noble gases?
Increases from left to right across the periodic table
200
Which property do metalloids share with nonmetals?
Both are brittle.
300
This is how sodium appears in the periodic table.
Atomic mass.
300
The elements least likely to form bonds are found in which group?
18
300
While looking at xenon (Xe) on the periodic table, a student needs to find an element with a smaller atomic mass in the same group. Where should the student look?
Directly up.
300
Which determines the reactivity of an alkali metal?
It's ability to lose electrons.
300
What is John's favorite subject?
History
400
An atom of the element zinc has an atomic number of 30 and a mass number of 65. How many protons does an uncharged zinc atom have?
30
400
Which statement describes a property of a proton?
Has a positive charge.
400
The table below lists the properties of a metallic element.
Group 12
400
What is John's favorite kind of animal?
Cat-asaurous-rex
400
Which argument best explains the charge of an atomic nucleus?
An atomic nucleus is positively charged because it is composed of protons.
500
What are the two parts of an atom?
Nucleus and the electron cloud
500
Who is known as the "father of modern chemistry” because he first organized all known elements into four different groups?
Antoine Lavoisier
500
The elements in group 17 of the periodic table are all called halogens. All halogens have the same
Number of valence electrons.
500
The Venn diagram compares protons with electrons. Which shared property belongs in the region marked "B”?
Is electrically charged
500
What is Artyom's favorite subject?
Math