What is the fundamental property of matter that can either be positive or negative?

Compared to protons, electrons have:

Atomic number is:

A particle with zero charge found in the nucleus of an atom is called a(n):

The mass of an electron is about

The letter e represents the elementary charge. In normal matter, the charge that would not be found is:

Do any of the atom diagrams below represent atoms of the same element?

Which of the following is a TRUE statement about atoms?

The diagrams below, in which arrows indicate the direction of movement, represent charged particles placed near one another. The diagram that correctly represents the motion of the charged particles is: (Hint: How to charges move on the periodic table?)

Atoms of the same element may contain:

Many models have been developed to explain the nature of atoms. The model that helped scientists to understand energy levels of atoms was developed by:

Why don't all the electrons in an atom fall to the lowest energy level?

The diagram below represents the electron energy levels for the first two levels of an atom. The dark circles show a filled electron energy level.

The diagram that would be represent an atom whose nucleus contains 5 protons and 4 neutrons is:

A way of organizing the elements based on their chemical properties is the:

Horizontal rows on the periodic table are called:

The location of metals on the periodic table is on the:

An example of a metalloid, elements with properties between metals and non-metals, is

The second row of the periodic table has 8 elements because:

The periodic table notation for nitrogen (N) is shown below. An atom of nitrogen has how many electrons?

The diagram below represents information that can be found on the periodic table for the element helium (He).

The atomic mass of a helium atom is indicated by the arrow at:

According to the periodic table, which group are the chemical elements that belong to the noble gases?

Using the periodic table, transition elements belong to groups:

According to the periodic table, transition metals include all of the following elements EXCEPT:

Elements used to make semiconductors for computers include germanium and:

An element essential to the manufacture of DNA and glow in the dark plastic is:

The most abundant element in Earth's crust is:

The noble gas, such as helium and xenon, are non-reactive because:

Of the following, the best insulator is the element:

A characteristic of elements that demonstrate the strongest periodicity is:

Which statement best explains why atoms form chemical bond with other atoms?

When an atom gains or loses electrons, it has an electrical charge. It is known as:

Transferring or sharing electrons between atoms forms:

Groups of atoms held together by covalent bonds are called:

Sodium forms an ionic bond with chlorine when sodium _____ an electron and chlorine _____ an electron.

Ionic bonds form:

In the atom represented below, the small dark circles represent electrons.

The number of valence electrons in the atom pictures is:

The largest number of valence electrons an atom in the first period can have is:

Elements in the first column of the periodic table are known as alkali metals. These elements, when ionized, have in common

Which statement is TRUE about elements in group 16?