Question
Barium is an element in group 2, period 6 of the periodic table. What does this indicate about its properties?(1 point)
Responses
It has 6 valence electrons and is soft and crumbly
It has 6 valence electrons and is soft and crumbly
It has 6 valence electrons and is a semimetal.
It has 6 valence electrons and is a semimetal.
It has 2 valence electrons and is a non reactive gas
It has 2 valence electrons and is a non reactive gas
It has 2 valence electrons and is highly reactive.
It has 2 valence electrons and is highly reactive.
Question 2
Which elements have the same number of valence electrons? Match them.
(4 points)
Put responses in the correct input to answer the question. Select a response, navigate to the desired input and insert the response. Responses can be selected and inserted using the space bar, enter key, left mouse button or touchpad. Responses can also be moved by dragging with a mouse.
Hydrogen
Radon
Carbon
Oxygen
Question 3
Match the examples below with the type of change occurring. Physical change or chemical change. Use all examples below. (8 points)
Put responses in the correct input to answer the question. Select a response, navigate to the desired input and insert the response. Responses can be selected and inserted using the space bar, enter key, left mouse button or touchpad. Responses can also be moved by dragging with a mouse.
Physical Change Chemical Change
Question 4
Vinegar and baking soda are put in a beaker together, and they undergo a chemical reaction. Look at the picture. How do you know a chemical reaction is occurring?
(1 point)
Responses
There is no chemical reaction. This is a physical change.
There is no chemical reaction. This is a physical change.
Changes shape
Changes shape
Changes size
Changes size
Bubbles are produced
Bubbles are produced
Question 5
Using the same image of the vinegar and baking soda chemical reaction... A scientist finds that the total mass after the compounds react, is less than the sum of the masses before they react. Which 2 statements explain this observation.
(1 point)
Responses
Some of the mass has escaped as a gas.
Some of the mass has escaped as a gas.
Some of the mass was destroyed during the reaction.
Some of the mass was destroyed during the reaction.
Law of conservation of mass. Mass can not be created nor destroyed.
Law of conservation of mass. Mass can not be created nor destroyed.
There is no way the mass can be different.
There is no way the mass can be different.
Question 6
How does the balanced chemical equation below demonstrate the Law of Conservation of Mass?
(1 point)
Responses
It shows that no atoms have been gained or lost during the reaction.
It shows that no atoms have been gained or lost during the reaction.
It shows that only physical changes follow the Law of Conservation of Mass.
It shows that only physical changes follow the Law of Conservation of Mass.
It shows that the properties of the elements stay the same after the reaction.
It shows that the properties of the elements stay the same after the reaction.
It shows that all compounds remain bonded after the reaction.
It shows that all compounds remain bonded after the reaction.
Question 7
How many atoms are in the equation below?
(1 point)
Responses
8
8
6
6
4
4
10
Responses
It has 6 valence electrons and is soft and crumbly
It has 6 valence electrons and is soft and crumbly
It has 6 valence electrons and is a semimetal.
It has 6 valence electrons and is a semimetal.
It has 2 valence electrons and is a non reactive gas
It has 2 valence electrons and is a non reactive gas
It has 2 valence electrons and is highly reactive.
It has 2 valence electrons and is highly reactive.
Question 2
Which elements have the same number of valence electrons? Match them.
(4 points)
Put responses in the correct input to answer the question. Select a response, navigate to the desired input and insert the response. Responses can be selected and inserted using the space bar, enter key, left mouse button or touchpad. Responses can also be moved by dragging with a mouse.
Hydrogen
Radon
Carbon
Oxygen
Question 3
Match the examples below with the type of change occurring. Physical change or chemical change. Use all examples below. (8 points)
Put responses in the correct input to answer the question. Select a response, navigate to the desired input and insert the response. Responses can be selected and inserted using the space bar, enter key, left mouse button or touchpad. Responses can also be moved by dragging with a mouse.
Physical Change Chemical Change
Question 4
Vinegar and baking soda are put in a beaker together, and they undergo a chemical reaction. Look at the picture. How do you know a chemical reaction is occurring?
(1 point)
Responses
There is no chemical reaction. This is a physical change.
There is no chemical reaction. This is a physical change.
Changes shape
Changes shape
Changes size
Changes size
Bubbles are produced
Bubbles are produced
Question 5
Using the same image of the vinegar and baking soda chemical reaction... A scientist finds that the total mass after the compounds react, is less than the sum of the masses before they react. Which 2 statements explain this observation.
(1 point)
Responses
Some of the mass has escaped as a gas.
Some of the mass has escaped as a gas.
Some of the mass was destroyed during the reaction.
Some of the mass was destroyed during the reaction.
Law of conservation of mass. Mass can not be created nor destroyed.
Law of conservation of mass. Mass can not be created nor destroyed.
There is no way the mass can be different.
There is no way the mass can be different.
Question 6
How does the balanced chemical equation below demonstrate the Law of Conservation of Mass?
(1 point)
Responses
It shows that no atoms have been gained or lost during the reaction.
It shows that no atoms have been gained or lost during the reaction.
It shows that only physical changes follow the Law of Conservation of Mass.
It shows that only physical changes follow the Law of Conservation of Mass.
It shows that the properties of the elements stay the same after the reaction.
It shows that the properties of the elements stay the same after the reaction.
It shows that all compounds remain bonded after the reaction.
It shows that all compounds remain bonded after the reaction.
Question 7
How many atoms are in the equation below?
(1 point)
Responses
8
8
6
6
4
4
10
Answers
Answered by
GPT-4o mini
Let's go through each question and its corresponding answers.
### Question 1
**Barium is an element in group 2, period 6 of the periodic table. What does this indicate about its properties?**
**Response:** It has 2 valence electrons and is highly reactive.
### Question 2
**Which elements have the same number of valence electrons? Match them.**
- Hydrogen → Matches with **Carbon**
- Oxygen → Matches with **Radon**
### Question 3
**Match the examples below with the type of change occurring. Physical change or chemical change.**
- Physical Change:
- Example 1: (e.g., Melting ice)
- Example 2: (e.g., Dissolving sugar in water)
- Chemical Change:
- Example 1: (e.g., Burning wood)
- Example 2: (e.g., Rusting iron)
(Note: Specific examples need to be provided for proper matching, as none are given in the question. This is just a general layout on how to organize it.)
### Question 4
**Vinegar and baking soda are put in a beaker together, and they undergo a chemical reaction. Look at the picture. How do you know a chemical reaction is occurring?**
**Response:** Bubbles are produced.
### Question 5
**A scientist finds that the total mass after the compounds react is less than the sum of the masses before they react. Which 2 statements explain this observation?**
**Responses:**
1. Some of the mass has escaped as a gas.
2. Law of conservation of mass. Mass can not be created nor destroyed.
### Question 6
**How does the balanced chemical equation below demonstrate the Law of Conservation of Mass?**
**Response:** It shows that no atoms have been gained or lost during the reaction.
### Question 7
**How many atoms are in the equation below?**
**Response:** (Assuming a balanced chemical equation is given, you will need to count the number of atoms accordingly based on the formula. Since no specific equation is provided, use the answer that seems most appropriate based on context.)
Choose one of the following based on the equation you have:
- 8
- 6
- 4
- 10
If you have the specific equation, you can sum the total number of individual atoms to find the correct answer.
---
Please fill in any missing pieces as necessary, especially in Question 3 where specific examples must be matched to the correct type of change.
### Question 1
**Barium is an element in group 2, period 6 of the periodic table. What does this indicate about its properties?**
**Response:** It has 2 valence electrons and is highly reactive.
### Question 2
**Which elements have the same number of valence electrons? Match them.**
- Hydrogen → Matches with **Carbon**
- Oxygen → Matches with **Radon**
### Question 3
**Match the examples below with the type of change occurring. Physical change or chemical change.**
- Physical Change:
- Example 1: (e.g., Melting ice)
- Example 2: (e.g., Dissolving sugar in water)
- Chemical Change:
- Example 1: (e.g., Burning wood)
- Example 2: (e.g., Rusting iron)
(Note: Specific examples need to be provided for proper matching, as none are given in the question. This is just a general layout on how to organize it.)
### Question 4
**Vinegar and baking soda are put in a beaker together, and they undergo a chemical reaction. Look at the picture. How do you know a chemical reaction is occurring?**
**Response:** Bubbles are produced.
### Question 5
**A scientist finds that the total mass after the compounds react is less than the sum of the masses before they react. Which 2 statements explain this observation?**
**Responses:**
1. Some of the mass has escaped as a gas.
2. Law of conservation of mass. Mass can not be created nor destroyed.
### Question 6
**How does the balanced chemical equation below demonstrate the Law of Conservation of Mass?**
**Response:** It shows that no atoms have been gained or lost during the reaction.
### Question 7
**How many atoms are in the equation below?**
**Response:** (Assuming a balanced chemical equation is given, you will need to count the number of atoms accordingly based on the formula. Since no specific equation is provided, use the answer that seems most appropriate based on context.)
Choose one of the following based on the equation you have:
- 8
- 6
- 4
- 10
If you have the specific equation, you can sum the total number of individual atoms to find the correct answer.
---
Please fill in any missing pieces as necessary, especially in Question 3 where specific examples must be matched to the correct type of change.
There are no human answers yet. A form for humans to post answers is coming very soon!