Question

What is defined as anything made up of atoms that has mass and takes up space?

Answer 1

Which components of the atom are found outside of the nucleus?

Answer 2

Which components of the atom have a positive charge?

Answer 3

What does the identity of an element depend on the number of?

Answer 4

What did Rutherford contribute to the model of the atom?

Answer 5

Solve for w.



​ 6+(w−10)=5

Answer 6

Solve for c.



c−1.5+6.8=0.6

Answer 7

Solve for x.



1/4 + 1/2 + x = − 3/4

Answer 8

Solve for x.



2 1/2x − 3/4 (2x + 5) = 3/8

Answer 9

What is the value of t?



1.4t−0.4(t−3.1)=5.8

Answer 10

What is the coefficient of −xy?

Answer 11

Matter

Answer 12

Electrons

Answer 13

Protons

Answer 14

The identity of an element depends on the number of protons in its nucleus, which is known as the atomic number.

Answer 15

Ernest Rutherford contributed to the model of the atom by proposing the nuclear model. Through his gold foil experiment, he discovered that the atom has a small, dense, positively charged nucleus at its center, surrounded by negatively charged electrons orbiting in empty space. This experiment provided evidence for the existence of a nucleus and led to the development of the nuclear model of the atom.

Answer 16

To solve for w in the equation 6+(w−10)=5, we can follow these steps:

1. Start by simplifying the equation by performing the operations inside the parentheses.
6 + w - 10 = 5

2. Combine like terms.
w - 4 = 5

3. To isolate w, add 4 to both sides of the equation.
w - 4 + 4 = 5 + 4
w = 9

Therefore, the value of w is 9.

Answer 17

To solve for c in the equation c−1.5+6.8=0.6, we can follow these steps:

1. Start by simplifying the equation by performing the operations.
c - 1.5 + 6.8 = 0.6

2. Combine like terms.
c + 5.3 = 0.6

3. To isolate c, subtract 5.3 from both sides of the equation.
c + 5.3 - 5.3 = 0.6 - 5.3
c = -4.7

Therefore, the value of c is -4.7.

Answer 18

To solve for x in the equation 1/4 + 1/2 + x = -3/4, we can follow these steps:

1. Start by simplifying the equation by adding the fractions on the left-hand side.
1/4 + 1/2 + x = -3/4
3/4 + x = -3/4

2. To isolate x, subtract 3/4 from both sides of the equation.
3/4 + x - 3/4 = -3/4 - 3/4
x = -6/4

3. Simplify the right-hand side by reducing the fraction if possible.
x = -3/2

Therefore, the value of x is -3/2 or -1.5.

Answer 19

To solve for x in the equation 2 1/2x − 3/4 (2x + 5) = 3/8, we can follow these steps:

1. Start by simplifying the equation by performing operations inside parentheses and combining like terms.
2 1/2x − 3/4(2x + 5) = 3/8

First, distribute the -3/4 to the terms inside the parentheses:
2 1/2x − 3/4 * 2x - 3/4 * 5 = 3/8

Simplify the expression:
2 1/2x − (3/2)x - 15/4 = 3/8

2. Convert the mixed number to an improper fraction.
2 1/2 = 5/2

The equation becomes:
5/2x − (3/2)x - 15/4 = 3/8

3. Combine like terms on the left-hand side.
(5/2 - 3/2)x - 15/4 = 3/8

Simplify:
(2/2)x - 15/4 = 3/8
(1)x - 15/4 = 3/8

4. Isolate x by getting rid of the fractions.
Multiply both sides of the equation by the common denominator of 4 and 8, which is 8.
8(1)x - 8(15/4) = 8(3/8)

Simplify:
8x - 30 = 3

5. Solve for x by isolating the variable.
Add 30 to both sides of the equation:
8x - 30 + 30 = 3 + 30
8x = 33

Divide both sides of the equation by 8 to solve for x:
8x/8 = 33/8
x = 33/8

Therefore, the value of x is 33/8 or 4 1/8.

Answer 20

To find the value of t in the equation 1.4t - 0.4(t - 3.1) = 5.8, we can follow these steps:

1. Start by simplifying the equation by distributing the -0.4 to the terms inside the parentheses.
1.4t - 0.4t + 0.4(3.1) = 5.8

Simplify the expression inside the parentheses:
1.4t - 0.4t + 1.24 = 5.8

2. Combine like terms on the left-hand side.
(1.4t - 0.4t) + 1.24 = 5.8

Simplify:
1.0t + 1.24 = 5.8
t + 1.24 = 5.8

3. Isolate t by subtracting 1.24 from both sides of the equation.
t + 1.24 - 1.24 = 5.8 - 1.24
t = 4.56

Therefore, the value of t is 4.56.

Answer 21

The coefficient of −xy is -1.