Unit 3A Atoms and Periodic Table Test

Front

What are protons and neutrons?

Back

Protons are positively charged particles found in the nucleus of an atom, while neutrons are neutral particles that also reside in the nucleus. They have the same mass but different charges.

Front

What is the electron configuration for an element with an ending of s²?

Back

An element with an ending electron configuration of s² has two electrons in its outermost s orbital, indicating it is in Group 2 of the periodic table.

Front

What are alkali metals?

Back

Alkali metals are elements found in Group 1 of the periodic table. They are highly reactive and have one electron in their outermost shell.

Front

What does the letter 'X' represent in the periodic table?

Back

The letter 'X' represents an element that has an ending electron configuration of s².

Front

What does the letter 'Q' represent in relation to element properties?

Back

The letter 'Q' represents an element that has similar properties to element 'M'.

Front

What is the significance of the ending electron configuration s²p⁶?

Back

An ending electron configuration of s²p⁶ indicates a full outer shell, characteristic of noble gases, making the element stable and non-reactive.

Front

How do you determine the charge of an atom?

Back

The charge of an atom is determined by the difference between the number of protons (positive charge) and electrons (negative charge). If protons exceed electrons, the atom is positively charged, and vice versa.

Front

What is the atomic number?

Back

The atomic number is the number of protons in the nucleus of an atom, which determines the element's identity.

Front

What is the mass number?

Back

The mass number is the total number of protons and neutrons in an atom's nucleus.

Front

What are valence electrons?

Back

Valence electrons are the electrons in the outermost shell of an atom that are involved in chemical bonding.