Atoms and the Periodic Table

Question 1

The elements in group 1 are best described as--

Accepted Answer

highly reactive metals

Question 2

What do elements in the same group on the Periodic Table have in common?

Accepted Answer

similar chemical properties

Question 3

Which subatomic particle determines chemical reactivity?

Accepted Answer

valence electrons

Question 4

Which of these particles has a positive charge?

Accepted Answer

proton

Question 5

Which most accurately lists the properties of this element?

Accepted Answer

A dull non-metal in group 14

Question 6

The smallest particle of matter that retains the properties of the substance is called--

Accepted Answer

an atom

Question 7

Which best describes the elements in group 17?

Accepted Answer

Highly reactive elements with 7 valence electrons

Question 8

A student builds a model of Phosphorus. Which correctly lists the properties of this element?

Accepted Answer

15 protons, 16 neutrons and atomic mass of 31

Question 9

The number of _____ determines the identity an element and is found in the _______.

Accepted Answer

protons; nucleus

Question 10

Name the element: I have a mass of 40 amu and 22 neutrons. Who am I?

Accepted Answer

Ar

Question 11

Which of the following elements is located in period 3 and group 13 on the periodic table?

Accepted Answer

Aluminum

Question 12

Which of the following is most accurate about the element shown below?

Accepted Answer

it's a non-metal

Question 13

The elements in the same column of the Periodic Table have--

Accepted Answer

the same number of valence electrons

Question 14

Which element is best represented by this Bohr Model?

Accepted Answer

an element in group 1

Question 15

A stable atom is electrically neutral because the number of ______ equal the number of _____.

Accepted Answer

positive charges; negative charges

Question 16

The second energy level of an element can hold a maximum of _____ electrons.

Accepted Answer

8

Question 17

The elements shown below are the least reactive on the Periodic Table because ____.

Accepted Answer

they have a full valence shell

Question 18

What is the mass number of the element below?

Accepted Answer

27

Question 19

All atoms of an element always contain the same number of _______.

Accepted Answer

protons

Question 20

How many valence electrons would be considered reactive?

Accepted Answer

1 or 7

Questions 20