CI 1.1-1.2

1.

1 point

In science, a hypothesis must be

manipulated

testable

correct

controlled

2.

1 point

What is the greatest number of valence electrons an atom can have?

2

8

3

12

3.

1 point

A well-tested explanation for a wide range of observations or experimental results is called scientific

hypothesis

law

inquiry

theory

4.

1 point

Which of the following are NOT examples of data?

quantitative observation

theories

qualitative observation

measurement

5.

1 point

Each family in a periodic table has its own characteristic properties based on the number of

ions

protons

neutrons

valence electrons

6.

1 point

In Rutherford's gold experiment, most positively charged particles passed through the foil, but a few particles were deflected strongly. This result caused Rutherford to infer

that electrons have almost no mass

that an atom's positive charge must be clustered in a tiny region in its center, called the nucleus.

that an atom consists of negative charges scattered throughout a ball of positive charge-something like raisins or berries in a muffin

that electrons move in specific orbits around the nucleus of an atom.

7.

1 point

A row across the periodic table is called a

family

section

period

group

8.

1 point

The atomic number is the number of

electrons in the nucleus of an atom

valence electrons in an atom

neutrons in the nucleus of an atom

protons in the nucleus of an atom

9.

1 point

Which of the following statements is NOT a part of John Dalton's atomic theory?

All elements are composed of atoms that cannot be divided

Electrons move in specific orbits around the nucleus of an atom

Every compound is composed of atoms of different elements, combined in a specific ratio

All atoms of the same element are exactly alike and have the same mass.

10.

1 point

Which particles in an atom are in the nucleus?

protons and neutrons

protons and ions

protons and electrons

electrons and neutrons

11.

1 point

What is the first thing you should do if an accident occurs?

Find the emergency equipment

Go to the nearest hospital

Notify your teacher

Start first aid treatment

12.

1 point

Electrons involved in bonding between atoms are

closest to the nucleus

valence electrons

inside the nucleus

positively charged

13.

1 point

If atoms of a halogen nonmetal (Group 17) gain one electron, the atoms then have

no valence electrons

17 valence electrons

8 valence electrons

7 valence electrons

14.

1 point

The most important lab safety rule is

always wear safety goggles

always wear a lab apron

always follow your teacher's instructions and textbook directions exactly

design and conduct your own experiments without asking your teacher

15.

1 point

The smallest particle of an element is called a(n)

compound

molecule

mixture

atom