Chemistry of Life Exit Ticket 2

When atom(s) of elements share electrons to fulfill the octet rule

• ionic bond

• noble gas

• covalent bond

• monoatomic atoms

Answer explanation

When atoms share electrons to achieve a full outer shell, they form a covalent bond. This process allows them to fulfill the octet rule, which is essential for stability in many molecules.

All matter is made of 

• energy 

• atoms 

• electrons 

• compounds 

Answer explanation

All matter is made of atoms, which are the basic building blocks of matter. While energy, electrons, and compounds are related concepts, atoms are the fundamental units that compose all substances.

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

Atoms combine to form _______. 

• electrons

• molecules

• nuclei

• neutrons

Answer explanation

Atoms combine to form molecules, which are groups of two or more atoms bonded together. Electrons, nuclei, and neutrons are components of atoms, not combinations of them.

Tags

NGSS.MS-PS1-1

Molecules formed from different types of elements are called what?

• Atoms

• Electrons

• molecules

• Compounds

Answer explanation

Molecules formed from different types of elements are called compounds. Unlike simple molecules, which consist of the same type of atoms, compounds are made up of two or more different elements chemically bonded together.

Tags

NGSS.MS-PS1-1

These are pure substances made of only one kind of atom.

• Mixtures

• Compounds

• Nucleus

• Elements

Answer explanation

Elements are pure substances consisting of only one type of atom, distinguishing them from mixtures and compounds, which contain multiple types of atoms or substances.

Which of the following is not an atomic particle?

• nucleus

• neutron

• electron

• proton

Answer explanation

The nucleus is not an atomic particle; it is the central part of an atom that contains protons and neutrons. In contrast, neutrons, electrons, and protons are all fundamental particles that make up an atom.

The atoms of each element have a unique number of

• electrons

• protons

• neutrons

• organelles

Answer explanation

The unique number of protons in an atom defines the element. While electrons and neutrons can vary, protons remain constant for each element, making them the defining characteristic.

Which of the following determines an element's atomic mass?

• protons

• neutrons

• electrons

• nucleus

Answer explanation

An element's atomic mass is determined by the total number of protons and neutrons in its nucleus. Protons contribute positively to the mass, while neutrons add mass without charge. Electrons have negligible mass.

Which of the following determines the atom's charge?

• number of electrons

• number of neutrons

• number of protons

• number of cells

Answer explanation

An atom's charge is determined by the number of electrons. If there are more electrons than protons, the atom is negatively charged; if there are fewer, it is positively charged. Neutrons do not affect charge.

Which type of bond occurs when atoms share electrons?

• ionic

• covalent

• hydrogen

• bail

Answer explanation

A covalent bond occurs when atoms share electrons to achieve stability. This is different from ionic bonds, where electrons are transferred, and hydrogen bonds, which are weaker interactions. Therefore, the correct answer is covalent.