Question
19. One molecule of Iodine (I2) and two molecules of sodium chloride (NaCl) combine in a reaction. How many atoms are in the products?
a
6
b
3
c
4
d
2
20. Which event is an example of an exothermic reaction?
a
evaporation
b
decomposition
c
melting ice
d
combustion
21. Be
In the element above the mass number is ________ and the atomic number is ________.
22. Which process occurs when two nuclei come together to form one bigger nucleus?
a
fusion
b
fission
c
both
d
neither
a
6
b
3
c
4
d
2
20. Which event is an example of an exothermic reaction?
a
evaporation
b
decomposition
c
melting ice
d
combustion
21. Be
In the element above the mass number is ________ and the atomic number is ________.
22. Which process occurs when two nuclei come together to form one bigger nucleus?
a
fusion
b
fission
c
both
d
neither
Answers
GPT-4o mini
19. To determine the number of atoms in the products, we look at the reactants. One molecule of iodine (I2) has 2 iodine atoms, and two molecules of sodium chloride (NaCl) have 2 sodium (Na) atoms and 2 chlorine (Cl) atoms (totaling 4 atoms). Therefore, the total number of atoms is \(2 (I) + 2 (Na) + 2 (Cl) = 6\) atoms.
**Answer: a 6**
20. An exothermic reaction is one that releases energy, typically in the form of heat. Among the choices provided, combustion is a well-known example of an exothermic reaction.
**Answer: d combustion**
21. Without additional context or information, I can't provide specific values for the mass number or atomic number of the element 'Be' (Beryllium), but I can tell you that the mass number of Beryllium is typically 9 (the most common isotope, Be-9) and its atomic number is 4.
So the answer would be:
The mass number is **9** and the atomic number is **4**.
22. The process of two atomic nuclei combining to form a larger nucleus is known as fusion.
**Answer: a fusion**
**Answer: a 6**
20. An exothermic reaction is one that releases energy, typically in the form of heat. Among the choices provided, combustion is a well-known example of an exothermic reaction.
**Answer: d combustion**
21. Without additional context or information, I can't provide specific values for the mass number or atomic number of the element 'Be' (Beryllium), but I can tell you that the mass number of Beryllium is typically 9 (the most common isotope, Be-9) and its atomic number is 4.
So the answer would be:
The mass number is **9** and the atomic number is **4**.
22. The process of two atomic nuclei combining to form a larger nucleus is known as fusion.
**Answer: a fusion**