Chemistry midterm review

The responding variable is:

The smallest unit of matter that retains its chemical identity is the

which best describes the density of an atom's nucleus ?

When an element loses one electron it has a

The energy change that occurs when an element gains an electron

What is the atomic mass of an isotope of an atom with 5 protons, 5 electrons and 6 neutrons?

In the equation C + O₂ yields CO₂. The C and O₂ are the:

Which of the following is NOT a physical change?

the energy needed to remove a valance electron

an element that gains an electron is called a

What is the density of a substance that has a mass of 1.0g and a volume of 1 mL?

Periodic Law states that there is a periodic repetition of phy and chem prop when arranged by

The amount of space that an object occupies is its____

Which is the best description of current atomic theory

Elements that tend to be shiny, malleable, ductile and good conductors of electricity are

A form of energy that exhibits wave-like behavior while traveling thru space

A charged particle is called a (an)

What subatomic particle varies in number in isotopes of an element?

Why do atoms bond?

Family 18 is also called the

Since the speed of light is a constant, wave length and frequency

(3.5 x 10⁴) x (2.0 x 10² )=

What two types of elements are involved in ionic bonding?

How many neutrons are in an atom with an atomic number of 21 and mass of 45?

What is the formula for sodium oxide?

How do compounds differ from mixtures?

Which is a correct statement regarding trends in electronegativity?

The ability of a bonded atom to attract electrons toward itself is:

emission of light occurs when an electron

The part of the atom that determines the properties of element is.

The principle quantum number indicates what property of an electron?

An atom that has lost an electron is called:

electrons occupy orbitals of equal energy, one electron will fill parallel spins then go back

A testable explanation or a possible explanation is a:

How many significant figures are in the number 0.00203

The steps used to gather info and test a hypothesis is called the

the 3 d space with a high probability of being occupied by an electron is

the horizontal rows on the periodic table are called

The number 233000, written in scientific notation is

Which of the following best describes the structure of a atom?

What is the name of the compound Fe₂O₃

In what block would you find the transition metals?

The Law of Conservation of Mass says that all atoms in the reactants

Scientist who re-arranged the periodic table using the elements atomic number

In order to melt ice you must

(4.50 x 10⁶ ) divided by (2.00 x 10⁴)