Science - Unit 3 (Atoms, Periodic Table, and Atomic Bonds)

Each atom of sulfur (S) has 6 valence electrons. Which of the elements in the image also has 6 valence electrons?

The p. table is divided by a zigzag line on the right side. Which is true for most of the elements that lie along it?

A student is investigating an ionic compound. Which property should the student expect to observe?

How do covalent bonds form?

Which of the following is not made up of atoms?

Calicium is an element. What is the smallest particle of calcium that has all the chemical properties of calcium?

Covalent bonds that form molecules are between what two types of elements?

Nitrogen has one more valence electron than carbon has. What can you infer about nitrogen's location on the p. table?

The info in the p. table is organized into boxes, which are placed in rows and columns. What does each box represent?

This diagram shows a change that occurs to a sodium atom. What is happening in the diagram?

Water is made up of units called molecules. Which description best defines a molecule?

Which of the following is a property of metals?

What do elements in the same group on the periodic table have in common?

What is true about the position of all metals in the periodic table?

Which of the analogies best describes a Bohr model of an atom?

Which property makes metals good conductors of electricity?

Sodium (Na) is in Group 1. (Na) atoms readily form bonds with other atoms. Which statement best explains this property?

Ionic bonds that form ionic compounds are usually between what two types of elements?

An atom of lead has the atomic number 82 and a mass number of 207. How many neutrons does this atom of lead have?

This diagram represents a type of bonding. Which sentence best describes the bonding shown?

Between which of these pairs of elements is a covalent bond most likely to form?

Carbon can react with oxygen to form carbon dioxide (CO₂). Which statement about this chemical change is true?

Which of the following scientists added negatively-charged particles to the model of the atom?

Which describes how elements are arranged in the periodic table?

Which of the following occurs when substances undergo chemical change?

Which of the following occurs when a sodium atom forms a positively charged sodium ion?

What must happen for an ion to form?

In a neutral atom, the number of electrons equals the number of what other part?

The diagram shows carbon dioxide. Based on the type of bonding shown, what term best describes a unit of carbon dioxide?

How does the strength of a metallic bond compare to other types of bonds?

You have been asked to draw a Bohr model of the element carbon. How would you arrange the dots that represent electrons?

A magnet attracts a piece of metal. How is this like a chemical bond?

Find the element with the average atomic mass of 87.62. Which of the following is the chemical symbol for this element?

This chart gives the atomic number and mass number of two elements. How many protons does Element B have?

Which properties most likely belong to a metal?

Based on the image, how is the current understanding of atomic structure different from Thomson and Rutherford's model.

This is a Bohr model of an atom of nitrogen. According to the model, how many valence electrons does the atom have?

This diagram shows a portion of the periodic table. What makes these shaded elements unique?

How do most ionic compounds compare with covalent compounds?

This diagram shows a model of an atom. Which label points to the nucleus?

Which model of an atom is correctly labeled?

Think about a wooden chair and a balloon. What do these two objects always have in common?

If you know the atomic number of an element and its position in the p. table, what can you determine about the element?

The prefix semi- means "partly." Which kind of element is most likely used to make semiconductors?

A student uses colored spheres to represent atoms in a model. In what situation would this type of model be most useful?

This part of the periodic table shows the elements in Groups 1 through 9. Which pair of elements are in the same group?

The periodic table is arranged in columns and rows. What are the columns and the rows of the periodic table called?

What information is in this square of the periodic table, from top to bottom?

Which of these is the smallest particle to retain the properties of an element?

An atom's mass number is 210 and its atomic number is 85. How many neutrons does the atom have?