Metalloids — Unit test Answers

Particle A has very little mass in comparison to Particle B. Both particles are in the same atom. Which is the best conclusion about Particles A and B?

Which element is most likely to carry electric current easily?

An atom of the element chromium has an atomic number of 24 and a mass number of 52. How many electrons are in an uncharged atom of chromium?

Which scientist believed that the probable, not exact, location of the electrons of an atom can be determined by using mathematics?

Where are alkaline earth metals found on the periodic table?

This is how manganese appears in the periodic table.

Sonya is studying a nonmetal element. She learns that the element is like other elements in its group because it can bond to form a salt or an acid. She also learns that the element is the most reactive element in its group. Which element is Sonya most likely studying?

The model below shows an atom of an element.

While looking at bromine (Br) on the periodic table, a student needs to find another element with very similar chemical properties but with a different atomic mass. Which best describes the student’s options?

Which is the property of nonmetals to evaporate easily?

How does Rutherford’s model of the atom compare with Thomson’s model?

Calcium, magnesium, and strontium are near each other on the periodic table and have some characteristics in common, but they differ in chemical reactivity. Which lists these metals in order from most reactive to least reactive?

What best describes the states of nonmetals when they are at room temperature?

Students are completing a table about a particular subatomic particle that helps make up an atom.What best explains how they should complete the table?

Which metal is most likely to form more than one kind of positively charged ion?