Question

question 4 1 pts an ionic bond is formed by: two or more positive ions combining. two or more negative ions combining. a positive and a negative ion attracting each other. sharing of a pair of electrons. question 5 1 pts acids: are proton donors. taste sour. release hydrogen ions in an aqueous solution. all of the above are true of acids. question 6 1 pts the kind of element is determined by the number of: protons. neutrons. mesotrons. electrons.

Explanation:

• For Question 4: An ionic bond is formed when a positive ion (cation) and a negative ion (anion) attract each other due to electrostatic forces. Positive - positive or negative - negative ions repel each other, and sharing of electrons forms a covalent bond.
• For Question 5: According to the Brønsted - Lowry theory, acids are proton donors. Acids have a sour taste and release hydrogen ions ($H^+$) in an aqueous solution.
• For Question 6: The number of protons in the nucleus of an atom determines the element's identity. Neutrons affect the isotope, mesotrons are not relevant here, and electrons are involved in chemical bonding but do not define the element.

Answer:

Question 4: a positive and a negative ion attracting each other.
Question 5: All of the above are true of acids.
Question 6: protons.