Science Chapter 9

1.

1 point

Which of the following is unique for any given element?

It's charge

Number of neutrons

The mass of the neutrons

Number of protrons

2.

1 point

To find the number of neutrons in an atom, subtract...

isotope number from atomic number

atomic number from mass number

mass number from atomic number

atomic number number from electron number

3.

1 point

What do you call a column on a periodic table?

4.

1 point

Which of the following is most reactive?

F (Fluorine)

I (Iodine)

Br (Bromine)

Cl (Chlorine)

5.

1 point

What is found in the nucleus of an atom? (Check all that apply)

Neutrons

Electrons

Moles

Protons

6.

1 point

How many valence electrons does Oxygen (O) have?

7.

1 point

The electron configuration: 1s^2 2s^2p^6 3s^2p^6 4s^2 3d^10 4p^4 is for what element? (I cant type in exponents)

Rubidium

Tin

Sulfur

Selenium

8.

1 point

As you move from left to right across a row, what happens to the number of valence electrons?

9.

1 point

Which of the following is the most reactive?

Li (Lithium)

K (Potassium)

Na (Sodium)

Cs (Cesium)

10.

1 point

What group of elements are recognized as the most reactive?

Alkali Metals

Transition Metals

Noble Gases

Halogens

11.

1 point

Which element is most common in your body's compounds?

Carbon

Potassium

Iron

Iodine

12.

1 point

Which list of elements contains only metals?

Tin, Gold, Silver, Copper

Hydrogen, Beryllium, Carbon, Bromine

Lithium, Cesium, Chlorine, Argon

Mercury, Iron, Copper, Helium

13.

1 point

Moving left to right across the periodic table, which of the following increases by exactly one?

Mass number

Atomic number

Isotope

Atomic mass unit

14.

1 point

What do protons and neutrons have in common?

They have similar masses

They both determine an atom's atomic number

They both have neutral charge

They both have a positive charge

15.

1 point

The difference between heavy water and regular water is that a hydrogen atom in heavy water has an extra _____

16.

1 point

What do you call a row on the periodic table?

17.

1 point

What is the difference between oxygen-17 and oxygen-18?

Number of protons

Number of valence electrons

Number of neutrons

18.

1 point

If Nitrogen has an atomic number of 7, how many protons does it have?

19.

1 point

The ___ ________ of an isotope is the sum of the number of protons and neutrons it contains.

20.

1 point

Protons, neutrons, and electrons have what charges? (In order)

Positive, negative, neutral

Positive, neutral, negative

Negative, neutral, positive

Neutral, positive, negative