I wanted to check my True and False Chemistry HW. I am not 100% they are correct.
1.the number of neutrons in an atom is reffered to as its atomic number False
2.the periodic table is arranged by increasing atomic number True
3.atomic number is equal to the number of electrons in an atom False
4.the number of protons in an atom identifies it as an atom of a particular element. True
5.most atoms have either a positive or a negative charge True.
Can you tell me if I am right. Thanks
3 and 6 are incorrect.
3. The atomic number is the number of protons in an atom; however, since the number of electrons is the same as the number of protons in the neutral atomm, then number of electrons is the atomic number also.
6. Atoms are neutral. All atoms are neutral. If they lose or gain electron(s), then they become ions.
Let's go through each statement one by one to determine if your answers are correct:
1. The number of neutrons in an atom is referred to as its atomic number.
False. The statement is incorrect. The number of neutrons in an atom is not referred to as its atomic number. The atomic number refers to the number of protons in an atom.
2. The periodic table is arranged by increasing atomic number.
True. The statement is correct. The periodic table is indeed arranged in order of increasing atomic number.
3. Atomic number is equal to the number of electrons in an atom.
False. The statement is incorrect. The atomic number of an atom refers to the number of protons in its nucleus. The number of electrons may vary depending on the ionization state of the atom.
4. The number of protons in an atom identifies it as an atom of a particular element.
True. The statement is correct. The number of protons in an atom determines its elemental identity. Each element has a unique number of protons.
5. Most atoms have either a positive or a negative charge.
False. The statement is incorrect. Most atoms are electrically neutral, meaning they have an equal number of protons and electrons. However, atoms can gain or lose electrons to become ions, which can have a positive or negative charge.
So, out of the five statements, you got 3 correct and 2 incorrect.
Sure! Let's go through each statement to determine if it is true or false.
1. The number of neutrons in an atom is referred to as its atomic number. (False)
To determine the correctness, we need to understand the definition of atomic number. Atomic number represents the number of protons in an atom, not neutrons. Neutrons are the neutral particles found in the nucleus of an atom, and their number can vary within different isotopes of an element. Therefore, the statement is false.
2. The periodic table is arranged by increasing atomic number. (True)
To check the validity of this statement, we can refer to any periodic table. The periodic table is indeed arranged in order of increasing atomic number. This arrangement allows for the elements to be organized based on their number of protons (atomic number) and exhibits periodic patterns in their properties. So, this statement is true.
3. Atomic number is equal to the number of electrons in an atom. (False)
This statement is not correct. The atomic number represents the number of protons in an atom, not electrons. Electrons are negatively charged particles that orbit the nucleus of an atom and are usually equal in number to the protons (in a neutral atom). However, the atomic number only reflects the protons in the nucleus, not the electrons. Therefore, this statement is false.
4. The number of protons in an atom identifies it as an atom of a particular element. (True)
This statement is correct. The number of protons in an atom determines the element it belongs to. Each element has a unique number of protons, and this is why the atomic number is used to identify elements. For example, all carbon atoms have 6 protons, and all oxygen atoms have 8 protons. Therefore, this statement is true.
5. Most atoms have either a positive or a negative charge. (True)
In their neutral state, atoms have an equal number of protons and electrons, resulting in no overall charge. However, atoms can gain or lose electrons, resulting in a positive or negative charge, respectively. Hence, this statement is true.
Summary:
Statement 1: False
Statement 2: True
Statement 3: False
Statement 4: True
Statement 5: True
So, you were correct for statements 2, 4, and 5, but statements 1 and 3 were false.