Nonmetals — Unit test Answers

Which determines the reactivity of an alkali metal?

When an atom that has no charge loses two electrons, it becomes a

What trend does the reactivity of most nonmetals show in a periodic table, excluding the noble gases?

The elements in group 17 of the periodic table are all called halogens. All halogens have the same

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?

Scientists in a lab are working with two different samples of the element mercury. They know that the different samples are different isotopes.

Joelle is a manager at a construction company, and she is interested in the chemistry behind the materials they use. She has begun studying the materials used to fill walls. She knows that to keep the temperature inside a room steady the material must be a thermal insulator, and she predicts that materials should not be acidic or else they would dissolve too easily in water.

Which statement describes a property of a proton?

A blue circle labeled proton and A overlaps a pink circle labeled electron and C. The overlap is labeled B.

What did Rutherford’s model of the atom include that Thomson’s model did not have?

Which element is most likely to be shiny?

The first model of the atom was developed through

Which element has the largest atomic radius?

Among the elements of the main group, the general trend in the first ionization energy moving across a period is not followed between group 2 and group 13. Which best explains these exceptions?

Which argument best explains the charge of an atomic nucleus?

Which best explains why ionization energy tends to decrease from the top to the bottom of a group?

When electrons are removed from the outermost shell of a calcium atom, the atom becomes

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?

Jerome is learning how the model of the atom has changed over time as new evidence was gathered. He has images of four models of the atom, but they are not in the correct order.In what order should Jerome put these models to show the development from the earliest model of the atom to the most recent one?

Who described atoms as small spheres that could not be divided into anything smaller?