Which statement describes the location and charge of the electrons in an atom?

• The electrons are inside the nucleus and have no charge

• The electrons are outside the nucleus and have no charge.

• The electrons are inside the nucleus and have a negative charge.

• The electrons are outside the nucleus and have a negative charge.

Why are the elements Fluorine (F), Chlorine (Cl), Bromine (Br), and Iodine (I) found in the same group on the periodic table?

• They are all metals.

• The mass is the same.

• They have similar properties.

• The number of protons in the nucleus are the same.

Which label correctly identifies the nucleus of the atom?

• A

• B

• C

• D

Which of the following statements describes how the periodic table is organized?

• The elements are organized alphabetically.

• The elements are organized by their size.

• The elements are organized by their properties.

• The elements are organized by the date they were discovered.

Elements are solid, liquid, and gas substances that can be found on Earth. Which statement best describes an element?

• Elements are combinations of different atoms.

• Elements are fast moving subatomic particles.

• Elements can be separated into smaller atoms.

• Elements can combine to make living and nonliving things.

Which of the two elements below have similar properties?

• Sodium (Na) and Fluorine (F)

• Potassium (K) and Francium (Fr)

• Chlorine (Cl) and Zinc (Zn)

• Magnesium (Mg) and Helium (He)

What subatomic particles are located in the nucleus of an atom?

• neutrons and axons

• quarks and electrons

• Protons and neutrons

• electrons and protons

What is the smallest unit found in the bar of gold?

• cell

• atom

• element

• nucleus

Which model represents a pure substance?

• Model 1 is a pure substance because it represents several elements.

• Model 2 is a pure substance because it represents a several elements.

• Model 3 is a pure substance because it represents one type of compound.

• Model 4 is a pure substance because it contains both elements and compounds.

Madison's lab group is given a dish that contains sand, shells and water. How should they classify the substance they have been given?

• The substance is a compound because it contains several elements.

• The substance is a pure substance because it’s made up of various compounds.

• The solution is a heterogeneous mixture because it does not have the same uniform appearance or composition.

• The solution is a homogeneous mixture because it has the same uniform appearance and composition throughout.