Atoms, Molecules, Ions

The image shows the periodic grid of potassium. How many electrons are found in the potassium atom?

• 19

• 20

• 39

• 40

Tags

NGSS.HS-PS1-1

What is the chemical name of MgCl2?

• Magnesium Chloride 2

• Magnesium Chloride

• Magnesium (II) Chloride

• Magnesium Dichloride

How many electrons are there in the cation Aluminum?

• 10

• 13

• 16

• 3

Tags

NGSS.HS-PS1-1

What are the building blocks of matter?

• Atoms

• Protons

• Cells

• Neutrons

Tags

NGSS.MS-PS1-1

Which of the following best describes isotopes?

• Isotopes have different numbers of neutrons.

• Isotopes have different numbers of protons.

• Isotopes are atoms of the same element with the same mass.

• Isotopes have different numbers of electrons.

The nucleus of an atom is made up of ___________________.

• Protons and Neutrino

• Neutrons and Electrons

• Protons and Neutrons

• Protons and Electrons

Tags

NGSS.HS-PS1-8

If your cation is a transition metal, it should have a _________________.

• Roman numeral

• Subscript

• Polyatomic Ion

• Prefix

When two elements combine with each other to form more than one compound, the mass of one element that combine with a fixed mass of the other are in a ratio of whole numbers.

• Law of Definite Composition

• Law of Multiple Proportions

• Law of Mass Conservation

• Law of Constant Composition

How does the average atomic mass of an element compare to the mass number?

• The average atomic mass is the average mass of a mixture of isotopes, whereas each isotope has its own mass number.

• The average atomic mass of an element is the same as its mass number.

• The average atomic mass is equal to the mass number of the most abundant isotope of an element.

• The average atomic mass includes the mass of the electrons, whereas the mass number depends only on the neutrons and the protons.

What is the chemical name of CsI?

• Cesium Monoiodide

• Carbon Sulfide Iodide

• Cesium Iodide

• Carbon Silicate