Physical Science Midterm

Front

What are the properties of elements in the same group of the periodic table?

Back

Elements in the same group have similar chemical properties due to having the same number of valence electrons.

Front

What is the significance of the atomic number in the periodic table?

Back

The atomic number represents the number of protons in an atom's nucleus and determines the element's identity.

Front

What is the chemical formula for the compound formed between calcium and chlorine?

Back

CaCl₂

Front

What is nuclear fusion?

Back

Nuclear fusion is the process where two atomic nuclei combine to form a larger nucleus, releasing energy.

Front

What is the half-life of a radioactive substance?

Back

The half-life is the time required for half of the radioactive atoms in a sample to decay.

Front

What are noble gases and where are they located in the periodic table?

Back

Noble gases are located in group 18 of the periodic table and are known for their lack of reactivity due to having a full valence shell.

Front

What is the difference between nuclear fission and nuclear fusion?

Back

Nuclear fission is the splitting of a heavy nucleus into smaller nuclei, while nuclear fusion is the combining of light nuclei to form a heavier nucleus.

Front

How do you determine the number of valence electrons in an element?

Back

The number of valence electrons can be determined by the group number of the element in the periodic table.

Front

What is the role of carbon-14 in dating archaeological finds?

Back

Carbon-14 is used in radiocarbon dating to determine the age of organic materials by measuring the remaining amount of carbon-14.

Front

What is a chemical bond?

Back

A chemical bond is the force that holds atoms together in a compound, which can be ionic or covalent.