Atomic Structure and Bonding Concepts

The seminar introduces a free online resource for middle school chemistry, focusing on the periodic table and bonding. It covers the structure of atoms, the periodic table, and chemical bonding, including covalent and ionic bonds. The session includes navigation of the middle school chemistry website, interactive activities, and a Q&A session. The seminar aims to provide educators with resources and strategies to teach basic chemistry concepts effectively.

What is the main purpose of the NSTA Learning Center mentioned in the seminar?

• To host science competitions

• To provide a platform for students to submit assignments

• To sell educational materials

• To offer professional learning resources for science educators

Which of the following statements about protons and electrons is true?

• Protons and electrons have the same charge

• Protons have no charge and electrons are negatively charged

• Protons are positively charged and electrons are negatively charged

• Protons are negatively charged and electrons are positively charged

What is the significance of the atomic number in the periodic table?

• It is a random number assigned to each element

• It shows the total number of electrons and protons

• It represents the number of neutrons in an atom

• It indicates the number of protons in an atom

Why is the average atomic mass of carbon not exactly 12?

• Because carbon atoms have different numbers of electrons

• Because carbon atoms have different numbers of protons

• Because carbon atoms are unstable

• Because carbon atoms have different numbers of neutrons

In the card game described, what does a card indicating 'six protons' signify?

• The element is hydrogen

• The element is nitrogen

• The element is carbon

• The element is oxygen

What defines an atom's identity?

• The atomic mass

• The number of electrons

• The number of protons

• The number of neutrons

Which of the following is true about energy levels in atoms?

• The fourth energy level can hold up to 2 electrons

• The third energy level fills up to 8 electrons before moving to the fourth level

• The second energy level can hold up to 18 electrons

• The first energy level can hold up to 8 electrons

What happens to the size of atoms as you move across a period in the periodic table?

• Atoms get larger

• Atoms become more reactive

• Atoms get smaller

• Atoms remain the same size

In a covalent bond, what primarily holds the atoms together?

• The transfer of electrons

• The sharing of electrons

• The sharing of protons

• The attraction between neutrons

What is the result of an ionic bond between sodium and chlorine?

• A molecule of oxygen gas

• A molecule of water

• A molecule of hydrogen gas

• A crystal of salt