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