2nd Nine Weeks Test

Which of the following is an example of a qualitative observation?

The particle theory of matter suggests -

Which is the atomic number of Zinc (Zn)?

Cl₂ + ___Na > 2NaCl  What number goes in the blank?

Which of the following is an example of an element?

Electrons have a ______________ charge.

Which model does the image below represent?

Which family on the Periodic Table includes fluorine (F), chlorine (Cl), and bromine (Br)?

Which is an example of a chemical reaction?

Silver

What does the subscript in teh chemical formula for carbon dioxide represent? CO₂

Which of the following elements is a nonmetal?

In modern atomic models, where are electrons found?

The periodic table is organized by atomic number, which is also the number of _ in the nucleus.

Neutrons have a ______________ charge.

This state of matter has a fixed volume but a variable shape; close particle that move freely

Which atomic model is shown in the drawing?

Iron

What type of chemical reaction releases energy in the form of heat?

Hydrogen is a(n)

Which of the following elements is a metal?

In the classroom lab, a chemical reaction released a large amount of heat. Is that __

Which atomic model best represents our current understanding of the atom?

Which substance contains in ionic bond?

An unknown compound has a pH of 3. This can be classified as

A + B > AB The A +B part is on the left side so we call them the

Salt water is a(n)

Which statement explains the Law of Conservation of Matter?

Which of the following is not a chemical property of matter?

Which particle has a negative charge?

Which element has an atomic mass of 19?

This state of matter has a variable volume and shape; moving particles have space around them

What is shown in the picture?

Water freezing into ice is an example of a/an

Sodium

Which family of the periodic table is the least chemically reactive?

An example of a physical change is -

Which substance contains a covalent bond?

According to atomic theory, electrons are usuall found -

What is true for potassium?

This state of matter has a fixed volume and a fixed shape

Which of the following is not a physical property.

Phosphorous

Which group of elements contains the most stable atoms?

Protons have a _____________ charge.

Pure Water is a(n)

Potassium

Particles include ions and electrons moving freely