What's wrong with the table?

Question

css

Hello!
There is a regular table in html and css.
When I enter a trait punk, it jumps, screenshots and code below! Thank you!
1. When nothing is written

2. When I add the item "Ilosc godzin"

Table code:

<table class="table">

  <tbody>
  <tr>
    <td>Tydzien pracy od:</td>
    <td>do:</td>
  </tr>
  <tr>
    <td>Poniedzialek</td>
    <td>ilosc godzin</td>
  </tr>
  <tr>
    <td>Wtorek</td>
    <td>ilosc godzin</td>
  </tr>
  <tr>
    <td>sroda<td>
    <td>ilosc godzin</td>
  </tr>
  <tr>
    <td>Czwartek</td>
    <td>ilosc godzin</td>
  </tr>
  <tr>
    <td>Piatek</td>
    <td>ilosc godzin</td>
  </tr>
  <tr>
    <td>Sobota</td>
    <td>ilosc godzin</td>
  </tr>
  <tr>
    <td>Niedziela</td>
    <td>ilosc godzin</td>
  </tr>
  <tr>
    <td></td>
    <td>summa</td>
  </tr>
  </tbody>
</table>

CSS tables:

table.table{
  width: 534px;
  height: 300px;
  border-spacing: 0px;
}
table.table th{
  height: 50px;
}
table.table td{
  height: 40px;
}
table.table tfoot td{
  height: 50px;
}

Answer 1

<tr>
    <td>sroda<td> // вы забыли закрыть тег - </td>. 
    <td>ilosc godzin</td>
</tr>