1.a
What are the three main particles that make up an atom?
protons, neutrons, and electrons
What determines the atomic number of an element?
The atomic number of an element is determined by the number of protons in the nucleus of its atoms. Each element has a unique atomic number
What is the main difference between ionic and covalent compounds?
Ionic compounds are often solids, and form crystals
What are isotopes?
Atoms with the same number of protons but different numbers of neutrons are called isotopes.
Where are protons and neutrons located within an atom?
in the center of the atom
How many protons does carbon have?
the atomic number is 6
What is an example of an ionic compound mentioned in the presentation?
unique in that it uses ATP to open and close the ion channel, but the ions flow DOWN their concentration gradient, which moves chloride ions
Define what an ion is.
an atom or group of atoms that has an electric charge.
How does electromagnetically change as you move down a group in the periodic table?
decreases down a group
How can you predict the bonding behavior of an element using its valence electrons?
The number of valence electrons of an atom determines its bonding behavior
What structural feature of water contributes to its bent molecular shape?
Bent shape causes dipoles to add up, making it polar
How does the number of neutrons affect the mass number of an isotope?
The number of nucleons (both protons and neutrons) in the nucleus is the atom's mass number, and each isotope of a given element has a different mass number
Why might elements with similar valence electron configurations exhibit similar chemical behavior?
valence electron configuration influences the way an element reacts with other elements
How does understanding the properties of elements help in predicting chemical reactions in real-world applications?
Understanding relative atomic mass is essential for stoichiometry, as it helps in determining the proportions of elements in chemical reactions
How do the properties of ionic compounds influence their use in batteries?
They have high melting and boiling points, often exceeding 300°C
Why is it important to include the charge when writing the symbol for an ion?
The magnitude of the charge is listed as a right superscript next to the symbol of the element.
Evaluate the role of the periodic table in the advancement of chemistry as a science. How has it changed our understanding of elements over time?
The modern periodic table has no gaps and has extended beyond what Mendeleev predicted
Compare and contrast the properties of alkali metals and transition metals based on their electron configurations.
The properties of the alkali metals are similar to each other as expected for elements in the same family. The alkali metals have the largest atomic radii
Formulate a hypothesis on how temperature changes might affect the solubility of ionic versus covalent compounds.
formulate a simple rule that predicts the solubility of most ionic compounds: salts in which the cations and anions are multiply charged.
Compare and contrast isotopes and ions in terms of their definitions and implications in chemistry.
The intention of this chapter is to give insight into the properties and peculiarities of the stable isotopes of the bioelements.