MrDrJones Midterm review PTchem

The three branches of science include Earth Science, Physical Science and what?

Ethanol has six hydrogen atoms, two carbon atoms and one oxygen atom Write the chemical formula

The energy levels of an atom are occupied by ____.

A halogen is an element that can react with a _____ and form an ionic compound called a salt.

Which statement about noble gases is correct?

The elements in the second column from the left edge of the periodic table are the _____.

Which elements are located between the metals and the nonmetals on the periodic table?

Protons and ____ are inside the nucleus.

____ are numbers on placed in front of an element or compound used to balance the equation.

Water has what density in g/cm³

Groups 3-12 in the middle can be held and are commonly known.

Which is a double-replacement

Which elements have properties of both metals and nonmetals?

____ reactions absorb energy.

Which of the following is a chemical change?

____ affects the rate of a chemical reaction.

Which of the following does NOT affect solubility of a substance?

The units for density are what?

Use the Symbols. Which is decomposition?

The nucleus of an atom consists of _____.

An sharing of electrons in a molecule is a ____.

Helium and most nonmetals are found in which area of the periodic table?

Sodium is an ion represented as Na⁺. What does the “+” represent?

In an atom, electrons ____.

A model that shows valence electrons and you can form molecules.

Use the Symbols. Which is synthesis?

Which of the following is an indication that a chemical reaction could have occurred?

Which of the following is a molecule?

Neutrons have a ____ charge.

What does O^-2 represent?

A graph usually has the ____ variable on the X axis because its the foundation of what your testing

All of the following elements conduct electricity. One they showed on Bill Nye. Which is NOT a metal?

The particles that make up an atom are ____.

Most metals are ____.

Modern chemists do, what is the primary way the PT is organized?

When oxygen is present and the reaction gives off energy, CO2 and H2O

Alkali metals are chemical family number.

Approximately how many elements are metals?

Plasma is a state of matter where it has so much energy that what happens?

two atoms have the same # of protons but different #'s of neutrons, they will have the same

You test a new vaccine to see if it helps people get better. What's the independent variable?

Which of the following is considered the building block of matter?

In a chemical equation, the formulas to the left of the arrow represent the _____.

Elements in group 18, on the far right and are inert

Which of the following is a physical change?

24.2 Kg = _ g?

Mendeleev organized elements in his table by ______

Reactants are on the ____ and products are on the ____ of a written equation.

A single proton has which electrical charge?

What is group 17?

If the number and types of atoms in a substance change when?

How many dots are shown in the electron dot diagram for calcium, element number 20?

Electrons have a ____ charge.

The metric system is standardized on what?

NaCl forms bonds by swapping an electrons, so its what kind of a compound?

These are dissolved by solvents

Of these, which is most reactive?

losing or gaining an electron like Na or Cl forms a what?

Which is the demo that we added copper sulfate to zinc?

Most nonmetals are ____.

Which of the following statements about the atom is false?

The place of an element in the modern periodic table is determined by its _____.

Which two particles would be attracted to each other?

Stainless steel, brass and bronze are all solutions of solids called

Most nonmetals are what state of matter?

The horizontal portions of the periodic table are called what?

baking soda and vinegar were weighed and reacted. The gas and products were the same.

A model that shows all the electrons in all the shells

A hydrogen atom has mass of what?

A chemical bond that occurs when atoms share electrons is a(n) ____ bond.