Question 1

Which of the following statements best describes a property of metals?

Accepted Answer

They are ductile and can be drawn into wires.

Question 2

Which element is classified as a metalloid based on its position on the periodic table?

Accepted Answer

Silicon (Si)

Question 3

According to Dalton's Atomic Theory, which statement is now known to be incorrect?

Accepted Answer

Atoms of the same element are identical in mass and properties.

Question 4

Which of the following elements has the highest metallic character?

Accepted Answer

Sodium (Na)

Question 5

A neutral atom of phosphorus (atomic number 15) has how many electrons?

Accepted Answer

15

Question 6

Which of the following is a property of nonmetals?

Accepted Answer

Poor conductor of electricity

Question 7

Which group on the periodic table contains the noble gases?

Accepted Answer

Group 18

Question 8

How many neutrons are in the isotope $$\mathrm{^{22}Ne}$$?

Accepted Answer

12

Question 9

Which of the following elements is most likely to form a cation?

Accepted Answer

Potassium (K)

Question 10

Which trend is correct for atomic size (atomic radius) on the periodic table?

Accepted Answer

Atomic size increases as you go down a group.

Question 11

A neutral atom of chlorine has 17 protons and 18 neutrons. What is its mass number?

Accepted Answer

35

Question 12

Which of the following best explains why elements in the same group often display similar chemical reactivity?

Accepted Answer

They have the same number of valence electrons.

Question 13

Which of the following elements has the lowest ionization energy?

Accepted Answer

Potassium (K)

Question 14

Which of the following is NOT a property of metals?

Accepted Answer

Brittle

Question 15

Which of the following is the correct nuclear symbol for an isotope of carbon with 7 neutrons?

Accepted Answer

$$\mathrm{^{13}C}$$

Question 16

Which element is a nonmetal and is found in period 2 of the periodic table?

Accepted Answer

Neon (Ne)

Question 17

If an atom has 12 protons, 12 neutrons, and 12 electrons, what is its atomic number and mass number?

Accepted Answer

Atomic number: 12, Mass number: 24

Question 18

Which of the following statements about isotopes is correct?

Accepted Answer

Isotopes of an element have different numbers of neutrons.

Question 19

Which element is in group 17 and period 3 of the periodic table?

Accepted Answer

Chlorine (Cl)

Question 20

Which of the following best describes the trend in ionization energy across a period from left to right?

Accepted Answer

Ionization energy increases.

Atoms & Elements: Structure, Properties, and the Periodic Table

Guida di studio - Domande di pratica