Which statement about metals and nonmetals is correct?(1 point)
Both metals and nonmetals can conduct electricity, but metals are generally malleable and nonmetals are generally brittle.
Which statement best explains why hydrogen’s atomic number is equal to its mass?(1 point)
The statement that best explains why hydrogen's atomic number is equal to its mass is that hydrogen has only one proton in its nucleus, and since the atomic number represents the number of protons in an atom, it is equal to the mass of a hydrogen atom.
Use the periodic table to answer the question.
I apologize for the confusion. The periodic table provides more detailed information regarding the elements, including their atomic number and atomic mass. In the case of hydrogen, its atomic number is 1, indicating that it has one proton. However, its atomic mass is 1.008, which is slightly greater than 1. This is because hydrogen can exist as different isotopes with varying numbers of neutrons, resulting in slightly different atomic masses. Therefore, the original statement that hydrogen's atomic number is equal to its mass is not correct.
There are several correct statements about metals and nonmetals. Here are a few:
1. Metals are typically solid at room temperature, while nonmetals can be found as solids, liquids, or gases.
2. Metals tend to have a shiny appearance, whereas nonmetals are generally dull.
3. Metals are good conductors of heat and electricity, whereas nonmetals are poor conductors.
4. Metals tend to have high melting and boiling points, while nonmetals have lower melting and boiling points.
5. Metals are malleable and ductile, meaning they can be easily shaped and stretched, unlike nonmetals.
Keep in mind that these are broad generalizations, and there are some exceptions and variations within each category.
To determine which statement about metals and nonmetals is correct, we need to understand the properties and characteristics of these two categories of elements.
1. Metals:
- Metals are typically solid at room temperature, except for mercury, which is a liquid.
- They have a shiny and lustrous appearance.
- Metals are good conductors of heat and electricity.
- They are malleable and ductile, meaning they can be easily hammered into thin sheets or drawn into wires.
- Metals usually have a high melting and boiling point.
2. Nonmetals:
- Nonmetals can exist in different states: solid, liquid, or gas.
- They have a dull appearance, lacking the shiny luster of metals.
- Nonmetals are poor conductors of heat and electricity.
- They are brittle and can easily crumble or break when subjected to force.
- Nonmetals have lower melting and boiling points compared to metals.
Now, based on these properties, we can evaluate the options to identify the correct statement about metals and nonmetals:
1. Metals are typically poor conductors of heat and electricity.
This statement is incorrect because metals are actually excellent conductors of heat and electricity.
2. Nonmetals are typically malleable and ductile.
This statement is incorrect because nonmetals are not malleable or ductile; instead, they tend to be brittle and easily breakable.
3. Metals have a shiny and lustrous appearance.
This statement is correct. Metals do have a shiny and lustrous appearance, which is one of their defining characteristics.
Therefore, the correct statement about metals and nonmetals is:
- Metals have a shiny and lustrous appearance.