Atom Test, Physical Science Test/ Review For Midterm

1. What plus what equals the atomic mass?

N+p

E+p

N+e

Z+a

Z+p

The atomic mass is determined by the sum of the number of neutrons (n) and the number of protons (p) in an atom's nucleus. Neutrons and protons contribute to the mass of an atom, while electrons (e) do not significantly affect the atomic mass. Therefore, the combination of neutrons and protons (n+p) is what equals the atomic mass.

Explanation

The atomic mass is determined by the sum of the number of neutrons (n) and the number of protons (p) in an atom's nucleus. Neutrons and protons contribute to the mass of an atom, while electrons (e) do not significantly affect the atomic mass. Therefore, the combination of neutrons and protons (n+p) is what equals the atomic mass.

2. What are isotopes?

The same amount of electrons but different neutrons

The same amount of neutrons but different electrons

The same amount of neutrons but different protons

The same amount of electrons but different protons

The same amount of protons but different neutrons

Isotopes are atoms of the same element that have the same number of protons but different numbers of neutrons. This means that they have the same atomic number (which is determined by the number of protons) but different atomic masses (which is determined by the number of protons and neutrons combined). Isotopes have similar chemical properties due to the same number of electrons, but they may have different physical properties and stability due to the different number of neutrons.

Explanation

Isotopes are atoms of the same element that have the same number of protons but different numbers of neutrons. This means that they have the same atomic number (which is determined by the number of protons) but different atomic masses (which is determined by the number of protons and neutrons combined). Isotopes have similar chemical properties due to the same number of electrons, but they may have different physical properties and stability due to the different number of neutrons.

3. What were the four different types of metals?

Wood, nonwood, tin, iron

Gold,platnium, rubium, silver

Metal, nonmetal, transitions, metalliods

Metal, non-metals, tin, metalliods

Metal, nonmetals, transitional and metalliods

The correct answer is "metal, nonmetals, transitional and metalliods." This answer correctly identifies the four different types of metals as metal, nonmetals, transitional, and metalliods. These categories are commonly used in the field of chemistry to classify elements based on their properties and characteristics.

Explanation

The correct answer is "metal, nonmetals, transitional and metalliods." This answer correctly identifies the four different types of metals as metal, nonmetals, transitional, and metalliods. These categories are commonly used in the field of chemistry to classify elements based on their properties and characteristics.

4. What is a Hypothesis?

A prediction

An educated guess

A guess in If...Then...Because format

Something in If...Then...Because format

A prediction in If...Then...Because format

A hypothesis is a prediction that is formulated using the If...Then...Because format. This format allows for a clear and logical explanation of the expected outcome based on the conditions or variables involved. By using this format, a hypothesis provides a framework for testing and analyzing the validity of the prediction.

Explanation

A hypothesis is a prediction that is formulated using the If...Then...Because format. This format allows for a clear and logical explanation of the expected outcome based on the conditions or variables involved. By using this format, a hypothesis provides a framework for testing and analyzing the validity of the prediction.

5. What is the symbol for the atomic mass?

A

S

O

M

Z

The symbol for the atomic mass is "z". This is because the atomic mass of an element is commonly represented by the letter "z" in scientific notation. The atomic mass is the weighted average mass of all the isotopes of an element, taking into account their abundance. It is an important characteristic of an element and is used in various calculations and equations in chemistry and physics.

Explanation

The symbol for the atomic mass is "z". This is because the atomic mass of an element is commonly represented by the letter "z" in scientific notation. The atomic mass is the weighted average mass of all the isotopes of an element, taking into account their abundance. It is an important characteristic of an element and is used in various calculations and equations in chemistry and physics.